{"title":"The current status and history of AFLAS.","authors":"Noriyuki Kasai","doi":"10.1186/s42826-022-00144-1","DOIUrl":"https://doi.org/10.1186/s42826-022-00144-1","url":null,"abstract":"<p><p>The Asian federation of laboratory animal science associations (AFLAS) was established on November 29, 2003, and will celebrate its 20th anniversary in 2023. During this time, the number of AFLAS member associations and societies increased from six founders to eleven, and eight AFLAS congresses and 19 council meetings were held. In addition, the education and training system of laboratory animal science and technology funding program to support the activities of AFLAS member associations or societies started in 2015. Unfortunately, the COVID-19 pandemic had a great impact on the activities of AFLAS, and the 10th Congress which was scheduled to be held in Thailand in 2021 had to be canceled. AFLAS must have its members work together to overcome this difficult situation and further develop.</p>","PeriodicalId":17993,"journal":{"name":"Laboratory Animal Research","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9700945/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10327947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Niraj A Shah, Laxit K Bhatt, Rajesh J Patel, Tushar M Patel, Nayankumar V Patel, Harshida G Trivedi, Nilam R Patel, Jitendra H Patel, Satish D Patel, Rajesh S Sundar, Mukul R Jain
{"title":"Hematological and biochemical reference intervals of wild-caught and inhouse adult Indian rhesus macaques (Macaca mulatta).","authors":"Niraj A Shah, Laxit K Bhatt, Rajesh J Patel, Tushar M Patel, Nayankumar V Patel, Harshida G Trivedi, Nilam R Patel, Jitendra H Patel, Satish D Patel, Rajesh S Sundar, Mukul R Jain","doi":"10.1186/s42826-022-00143-2","DOIUrl":"https://doi.org/10.1186/s42826-022-00143-2","url":null,"abstract":"<p><strong>Background: </strong>Nonhuman primates are used for research purposes such as studying diseases and drug discovery and development programs. Various clinical pathology parameters are used as biomarkers of disease conditions in biomedical research. Detailed reports of these parameters are not available for Indian-origin rhesus macaques. To meet the increasing need for information, we conducted this study on 121 adult Indian rhesus macaques (57 wild-sourced and 64 inhouse animals, aged 3-7 years). A total of 18 hematology and 18 biochemistry parameters were evaluated and reported in this study. Data from these parameters were statistically evaluated for significance amongst inhouse and wild-born animals and for differences amongst sexes. The reference range was calculated according to C28-A3 guidelines for reporting reference intervals of clinical laboratory parameters.</p><p><strong>Results: </strong>Source of the animals and sex appeared to have statistically significant effects on reference values and range. Wild-born animals reported higher WBC, platelets, neutrophils, RBC, hemoglobin, HCT, MCV, and total protein values in comparison to inhouse monkeys. Sex-based differences were observed for parameters such as RBCs, hemoglobin, HCT, creatinine, calcium, phosphorus, albumin, and total protein amongst others.</p><p><strong>Conclusions: </strong>Through this study, we have established a comprehensive data set of reference values and intervals for certain hematological and biochemical parameters which will help researchers in planning, conducting, and interpreting various aspects of biomedical research employing Indian-origin rhesus monkeys.</p>","PeriodicalId":17993,"journal":{"name":"Laboratory Animal Research","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9652035/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40683057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"In vivo molecular imaging in preclinical research.","authors":"Su Jin Kim, Ho-Young Lee","doi":"10.1186/s42826-022-00142-3","DOIUrl":"https://doi.org/10.1186/s42826-022-00142-3","url":null,"abstract":"<p><p>In vivo molecular imaging is a research field in which molecular biology and advanced imaging techniques are combined for imaging molecular-level biochemical and physiological changes that occur in a living body. For biomolecular imaging, the knowledge of molecular biology, cell biology, biochemistry, and physiology must be applied. Imaging techniques such as fluorescence, luminescence, single-photon emission computed tomography (SPECT), positron emission tomography (PET), computed tomography (CT), and magnetic resonance imaging (MRI) are used for biomolecular imaging. These imaging techniques are used in various fields, i.e., diagnosis of various diseases, development of new drugs, development of treatments, and evaluation of effects. Moreover, as biomolecular imaging can repeatedly acquire images without damaging biological tissues or sacrificing the integrity of objects, changes over time can be evaluated.Phenotypes or diseases in a living body are caused by the accumulation of various biological phenomena. Genetic differences cause biochemical and physiological differences, which accumulate and cause anatomical or structural changes. Biomolecular imaging techniques are suitable for each step. In evaluating anatomical or structural changes, MRI, CT, and ultrasound have advantages in obtaining high-resolution images. SPECT and MRI are advantageous for the evaluation of various physiological phenomena. PET and magnetic resonance spectroscopy can be used to image biochemical phenomena in vivo. Although various biomolecular imaging techniques can be used to evaluate various biological phenomena, it is important to use imaging techniques suitable for each purpose.</p>","PeriodicalId":17993,"journal":{"name":"Laboratory Animal Research","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9585739/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40659829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Young Kyu Kim, JuKyung Lee, Hyeon-Young Kim, Sung-Hwan Kim, Jeong Ho Hwang, Han Na Suh
{"title":"Key factors to establish the ovalbumin-induced atopic dermatitis minipig model: age and body weight.","authors":"Young Kyu Kim, JuKyung Lee, Hyeon-Young Kim, Sung-Hwan Kim, Jeong Ho Hwang, Han Na Suh","doi":"10.1186/s42826-022-00141-4","DOIUrl":"https://doi.org/10.1186/s42826-022-00141-4","url":null,"abstract":"<p><strong>Background: </strong>Given its similar structure and immune response to the human skin, porcine is a good model for dermal studies. Here, we sensitized ovalbumin (Ova) on minipig back skin for 2-4 weeks to induce chronic atopic dermatitis (AD).</p><p><strong>Results: </strong>Gross observation, serum cytokine level, epidermal thickness, and epidermal integrity did not change after 4 weeks of Ova induction compared with the control, indicating AD modeling failure. Only the neutrophils in the blood and macrophages in bronchoalveolar lavage fluid changed slightly until 3 or 2 weeks after Ova sensitization, respectively. The successful and failed Ova-induced AD minipig models only differ in age and body weight of the minipigs. The minipigs, 12 months old with a 30-kg median weight, had a two-fold thicker dermis than minipigs 8-10 months old, with an 18.97-kg median weight, resulting in impaired Ova permeability and immune response.</p><p><strong>Conclusion: </strong>Age and body weight are key factors that should be considered when developing an Ova-induced AD minipig model.</p>","PeriodicalId":17993,"journal":{"name":"Laboratory Animal Research","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9585725/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40647440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kristine Eraker Aasland Hansen, Alexandra M Hudecová, Fred Haugen, Eystein Skjerve, Erik Ropstad, Karin E Zimmer
{"title":"Comparison of young male mice of two different strains (C57BL/6J and the hybrid B6129SF1/J) in selected behavior tests: a small scale study.","authors":"Kristine Eraker Aasland Hansen, Alexandra M Hudecová, Fred Haugen, Eystein Skjerve, Erik Ropstad, Karin E Zimmer","doi":"10.1186/s42826-022-00140-5","DOIUrl":"https://doi.org/10.1186/s42826-022-00140-5","url":null,"abstract":"<p><strong>Background: </strong>All mouse strains are different, before choosing a strain for a large study, a small scale study should be done. In this study, we compared young males of two mouse strains, C57BL/6J and the hybrid B6129SF1/J, and gained knowledge on their performance in three different behavioral tests; open field (OF) test, Barnes maze (BM) test and a restraint stress test.</p><p><strong>Results: </strong>We found that the young males of the C57BL/6J strain spent more time moving in the OF. In the BM, the hybrid covered less ground before reaching the goal box during the first three sessions, than the C57BL/6J. The hybrid left more fecal pellets than C57BL/6J both in OF and BM. During the stress test, the C57BL/6J had a lower corticosterone response than the hybrid.</p><p><strong>Conclusions: </strong>Our findings indicate that the C57BL/6J has a presumably higher locomotor activity and/or explorative behavior than the hybrid, while the hybrid appeared more sensitive to stress.</p>","PeriodicalId":17993,"journal":{"name":"Laboratory Animal Research","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9526948/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40385965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jong Su Byun, Ji Hyun Lee, Jin Seok Kang, Beom Seok Han
{"title":"Comparative analysis of imaging diagnostic models for tubular basophilia and mineralization of kidney.","authors":"Jong Su Byun, Ji Hyun Lee, Jin Seok Kang, Beom Seok Han","doi":"10.1186/s42826-022-00139-y","DOIUrl":"https://doi.org/10.1186/s42826-022-00139-y","url":null,"abstract":"<p><strong>Background: </strong>Now that it is possible to efficiently classify and save tissue images of laboratory animals using whole-slide imaging, many diagnostic models are being developed through transfer learning with Convolutional Neural Network (CNN). In this study, transfer learning was performed to gain toxicopathological knowledge using CNN models such as InceptionV3 and Xception. For the classification of tubular basophilia and mineralization, two representative background lesions that commonly occur in toxicological studies, accuracies of diagnosis were compared using MobileNetV2, Xception and InceptionV3. For the simultaneous detection of the two lesions, the accuracy was analysed using You Only Look Once version 4 (YOLOv4).</p><p><strong>Results: </strong>The accuracy of the classification models was as follows: MobileNetV2 (epoch 50, accuracy: 98.57%) > Xception (epoch 70, accuracy: 97.47%) > InceptionV3 (epoch 70, accuracy: 89.62%). In the case of object detection, the accuracy of YOLOv4 was 98.62% at epoch 3000.</p><p><strong>Conclusions: </strong>Among the classification models, MobileNetV2 had the best accuracy despite applying a lower epoch than InceptionV3 and Xception. The object detection model, YOLOv4, accurately and simultaneously diagnosed tubular basophilia and mineralization, with an accuracy of 98.62% at epoch 3000.</p>","PeriodicalId":17993,"journal":{"name":"Laboratory Animal Research","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9476251/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40357443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hajin Nam, Boyoung Kim, Avishekh Gautam, Yoo Yeon Kim, Eun Sun Park, Jong Sun Lee, Hyung-Joo Kwon, Je Kyung Seong, Jun Gyo Suh
{"title":"Elucidating the characteristics of Mx1 and resistance to influenza A virus subtype H1N1 in the newly developed KWM/Hym mice.","authors":"Hajin Nam, Boyoung Kim, Avishekh Gautam, Yoo Yeon Kim, Eun Sun Park, Jong Sun Lee, Hyung-Joo Kwon, Je Kyung Seong, Jun Gyo Suh","doi":"10.1186/s42826-022-00138-z","DOIUrl":"https://doi.org/10.1186/s42826-022-00138-z","url":null,"abstract":"<p><strong>Background: </strong>Inbred mice have several advantages, including genetic similarity to humans, a well-established gene manipulation system, and strong tolerance to inbreeding. However, inbred mice derived from a limited genetic pool have a small genetic diversity. Thus, the development of new inbred strains from wild mice is needed to overcome this limitation. Hence, in this study, we used a new strain of inbred mice called KWM/Hym. We sequenced the Mx1 gene to elucidate the genetic diversities of KWM/Hym mice and observed the biological alterations of the Mx1 protein upon influenza A infection.</p><p><strong>Results: </strong>The Mx1 gene in KWM/Hym mice had 2, 4, and 38 nucleotide substitutions compared to those in the Mx1 gene in A2G, CAST/EiJ, and Mus spretus mice, respectively. Moreover, the Mx1 protein in KWM/Hym mice had 2 and 25 amino acid substitutions compared to those in the Mx1 protein in CAST/EiJ and M. spretus mice, respectively. To elucidate the function of the Mx1 protein, we inoculated the influenza A virus (A/WSN/1933) in KWM/Hym mice. Nine days after infection, all infected KWM/Hym mice survived without any weight loss. Four days after infection, the lungs of the infected KWM/Hym mice showed mild alveolitis and loss of bronchiolar epithelium; however, the pulmonary viral titers of the infected KWM/Hym mice were significantly lower than that in the infected BALB/c mice (2.17 × plaque-forming units mL<sup>-1</sup>).</p><p><strong>Conclusions: </strong>Our results demonstrate that the KWM/Hym mice are resistant to influenza A virus infection. Further, these mice can be used as a model organism to understand the mechanism of influenza A virus susceptibility.</p>","PeriodicalId":17993,"journal":{"name":"Laboratory Animal Research","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9454180/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33450940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Improvement plans on the operation of the Institutional Animal Care and Use Committee: focusing on the case of Seoul National University.","authors":"Na Ahn, Jaehak Park, Jungjoon Ihm, Sangho Roh","doi":"10.1186/s42826-022-00137-0","DOIUrl":"https://doi.org/10.1186/s42826-022-00137-0","url":null,"abstract":"<p><strong>Background: </strong>The Institutional Animal Care and Use Committee (IACUC) became compulsory in 2008 by the Animal Protection Act in Korea. Seoul National University (SNU), which conducts 5% of Korea's total animal protocol reviews and uses 10% of national laboratory animal usage, has been influential in the review of animal protocols and management of animal facilities. This study was undertaken to suggest the operational improvement of the IACUC. It focused on the case of SNU.</p><p><strong>Results: </strong>The methodological framework consists of a qualitative approach. In particular, this study is focused on the grounded theory approach and sixty people were surveyed through purposeful sampling. Through this study, we found that various practical educations are necessary such as: (1) education for researchers on how to write a protocol, (2) standardization of screening criteria for various animal experiments by presenting various cases, (3) training on a detailed understanding of relevant laws and policies. In particular, an integrated management system, making it possible to share information among the related committees, would be essential for smoother operation of the IACUC.</p><p><strong>Conclusions: </strong>If various levels of education and the integrated management system are established, it will be possible to enhance the excellence of researchers and to better manage the operation of the IACUC.</p>","PeriodicalId":17993,"journal":{"name":"Laboratory Animal Research","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9387048/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40708595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pherah A Ouma, Victoria K Mwaeni, Peris W Amwayi, Alfred Orina Isaac, James Nyabuga Nyariki
{"title":"Calcium carbide-induced derangement of hematopoiesis and organ toxicity ameliorated by cyanocobalamin in a mouse model.","authors":"Pherah A Ouma, Victoria K Mwaeni, Peris W Amwayi, Alfred Orina Isaac, James Nyabuga Nyariki","doi":"10.1186/s42826-022-00136-1","DOIUrl":"https://doi.org/10.1186/s42826-022-00136-1","url":null,"abstract":"<p><strong>Background: </strong>Calcium carbide (CaC<sub>2</sub>) is a chemical primarily used in the production of acetylene gas. The misuse of CaC<sub>2</sub> to induce fruit ripening is a global challenge with a potential adverse effects to human health. Additionally, CaC<sub>2</sub> is known to contain some reasonable amount of arsenic and phosphorous compounds that are toxic and pose a danger to human health when ingested. The current study sought to characterize CaC<sub>2</sub> toxicity and elucidate any protective effects by cyanocobalamin (vitamin B<sub>12</sub>), a well-established antioxidant and anti-inflammatory bio-molecule. Female Swiss white mice were randomly assigned into three groups; the first group was the control, while the second group was administered with CaC<sub>2</sub>. The third group received CaC<sub>2</sub> followed by administration of vitamin B12. The mice were sacrificed at 60 days post treatment, hematological, biochemical, glutathione assay, cytokine ELISA and standard histopathology was performed.</p><p><strong>Results: </strong>CaC<sub>2</sub> administration did not significantly alter the mice body weight. CaC<sub>2</sub> administration resulted in a significant decrease in packed cell volume (PCV), hemoglobin (Hb), red blood cells (RBCs) and RBC indices; indicative of CaC<sub>2</sub>-driven normochromic microcytic anaemia. Further analysis showed CaC<sub>2</sub>-driven leukopenia. Evidently, vitamin B<sub>12</sub> blocked CaC<sub>2</sub>-driven suppression of PCV, Hb, RBCs and WBCs. Monocytes and neutrophils were significantly up-regulated by CaC<sub>2</sub>. CaC<sub>2</sub>-induced elevation of aspartate aminotransferase (AST), alanine aminotransferase (ALT) and bilirubin signaled significant liver damage. Notably, vitamin B<sub>12</sub> stabilized AST, ALT and bilirubin in the presence of CaC<sub>2,</sub> an indication of a protective effect. Histopathological analysis depicted that vitamin B<sub>12</sub> ameliorated CaC<sub>2</sub>-driven liver and kidney injury. CaC<sub>2</sub> resulted in the depletion of glutathione (GSH) levels in the liver; while in the brain, kidney and lungs, the GSH levels were elevated. CaC<sub>2</sub> administration resulted in elevation of pro-inflammatory cytokines TNF-α and IFN-γ. Vitamin B<sub>12</sub> assuaged the CaC<sub>2</sub>-induced elevation of these pro-inflammatory cytokines.</p><p><strong>Conclusions: </strong>These findings demonstrate for the first time that oral supplementation with vitamin B<sub>12</sub> can protect mice against CaC<sub>2</sub>-mediated toxicity, inflammation and oxidative stress. The findings provide vital tools for forensic and diagnostic indicators for harmful CaC<sub>2</sub> exposure; while providing useful insights into how vitamin B<sub>12</sub> can be explored further as an adjunct therapy for CaC<sub>2</sub> toxicity.</p>","PeriodicalId":17993,"journal":{"name":"Laboratory Animal Research","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9373447/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40610172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Impact of transit time on the reproductive capacity of Euprymna scolopes as a laboratory animal.","authors":"Andrew G Cecere, Tim I Miyashiro","doi":"10.1186/s42826-022-00135-2","DOIUrl":"https://doi.org/10.1186/s42826-022-00135-2","url":null,"abstract":"<p><strong>Background: </strong>The Hawaiian bobtail squid Euprymna scolopes hosts various marine bacterial symbionts, and these symbioses have served as models for the animal-microbe relationships that are important for host health. Within a light organ, E. scolopes harbors populations of the bacterium Vibrio fischeri, which produce low levels of bioluminescence that the squid uses for camouflage. The symbiosis is initially established after a juvenile squid hatches from its egg and acquires bacterial symbionts from the ambient marine environment. The relative ease with which a cohort of wild-caught E. scolopes can be maintained in a mariculture facility has facilitated over 3 decades of research involving juvenile squid. However, because E. scolopes is native to the Hawaiian archipelago, their transport from Hawaii to research facilities often represents a stress that has the potential to impact their physiology.</p><p><strong>Results: </strong>Here, we describe animal survival and reproductive capacity associated with a cohort of squid assembled from two shipments with markedly different transit times. We found that the lower juvenile squid counts generated by animals with the longer transit time were not due to the discrepancy in shipment but instead to fewer female squid that produced egg clutches at an elevated rate, which we term hyper-reproductivity. We find that hyper-reproductive females were responsible for 58% of the egg clutches laid.</p><p><strong>Conclusions: </strong>The significance of these findings for E. scolopes biology and husbandry is discussed, thereby providing a platform for future investigation and further development of this cephalopod as a valuable lab animal for microbiology research.</p>","PeriodicalId":17993,"journal":{"name":"Laboratory Animal Research","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9338615/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40568812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}