Invertebrate Biology最新文献_第10页

The life history fitness of F1 hybrids of the microcrustaceans Daphnia pulex and Daphnia pulicaria (Crustacea, Anomopoda) 微甲壳类水蚤和水蚤F1杂交的生活史适应度(甲壳纲，Anomopoda)

IF 1.2 4区生物学

Invertebrate Biology Pub Date : 2021-04-20 DOI: 10.1111/ivb.12333

Irene Moy, Makayla Green, Thinh Phu Pham, Dustin Huy-Khang Luu, Sen Xu

引用次数: 0

Reproduction, recruitment, and growth of the Arctic deep-sea hydroid Bouillonia cornucopia 北极深海水螅的繁殖、招募和生长

IF 1.2 4区生物学

Invertebrate Biology Pub Date : 2021-04-18 DOI: 10.1111/ivb.12332

Kirstin S. Meyer-Kaiser, Caitlin Q. Plowman, Thomas Soltwedel

{"title":"Reproduction, recruitment, and growth of the Arctic deep-sea hydroid Bouillonia cornucopia","authors":"Kirstin S. Meyer-Kaiser, Caitlin Q. Plowman, Thomas Soltwedel","doi":"10.1111/ivb.12332","DOIUrl":"10.1111/ivb.12332","url":null,"abstract":"Invertebrates in polar and deep-sea environments that have complex life histories are exposed to unique environmental conditions that may favor non-pelagic development and K-strategist reproduction. Although many polar species follow this strategy, the numerically most abundant species tend to have more r-strategist life-history characteristics. We deployed artificial substrata over 3 years in the Arctic deep sea and collected hundreds of specimens of the athecate hydroid Bouillonia cornucopia. While this species has previously been described as rare, we report dense, patchy recruitment on artificial substrata, suggesting that B. cornucopia is highly opportunistic. This species has rapid growth compared to other sessile invertebrates in the study area, high fecundity, and continuous reproduction—all characteristics of an r-selected life history. The species’ gonophores are simple, lacking an obvious spadix or radial canals. We observed nurse cells in histological sections of female gonophores, but no male gonophores were observed. Gonophores break away from the blastostyles in mature specimens and appear to have fertilization envelopes, suggesting that each gonophore is composed of a single oocyte and that embryological development occurs in the water column. Hydroids are typically the first invertebrates to recruit to substrata in the Arctic but are easily overgrown. The opportunistic life histories of B. cornucopia and other hydroids may be adaptive for maintaining populations in the face of high mortality. Our study demonstrates the utility of artificial substrata for collections of otherwise rare opportunistic species.","PeriodicalId":54923,"journal":{"name":"Invertebrate Biology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/ivb.12332","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46283568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Notopodial “spinning glands” of Sthenelanella (Annelida: Sigalionidae) are modified chaetal sacs Sthenelanella(环节动物:sigalionae科)的上层“纺丝腺”是经过修饰的毛囊

IF 1.2 4区生物学

Invertebrate Biology Pub Date : 2021-04-06 DOI: 10.1111/ivb.12334

Ekin Tilic, Alicia Geratz, Greg W. Rouse, Thomas Bartolomaeus

{"title":"Notopodial “spinning glands” of Sthenelanella (Annelida: Sigalionidae) are modified chaetal sacs","authors":"Ekin Tilic, Alicia Geratz, Greg W. Rouse, Thomas Bartolomaeus","doi":"10.1111/ivb.12334","DOIUrl":"10.1111/ivb.12334","url":null,"abstract":"Sthenelanella is an unusual genus of tube-dwelling scale worms, with fine fibrous threads that appear on either side of the body. These fibers emerge dorsally in long silvery bundles that are then tightly interwoven to construct the felt-like material of the tube. In the literature, these fibers are described as the products of so-called “spinning glands.” In this article, we investigated the ultrastructure of these notopodial fibers and show that they are annelid chaetae. Three or four dynamic microvilli of a basal chaetoblast form each of these feltage chaetae, making them the thinnest known annelid bristles. Our results show that the spinning glands of Sthenelanella uniformis are additional, highly modified notopodial chaetal sacs. We also show that the follicle cells, by their secretion of the enamel layer, play an active role in shaping the final chaeta. These findings not only increase the known morphological diversity of chaetae but also demonstrate the apparent plasticity of the machinery that form these chitinous structures. Our results are compared with chaetae in other annelids, with a particular focus on similar fibrous chaetae in Aphroditiformia.","PeriodicalId":54923,"journal":{"name":"Invertebrate Biology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/ivb.12334","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43905552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Digestion and nutrition in freshwater bryozoans (Phylactolaemata) 淡水苔藓虫的消化与营养

IF 1.2 4区生物学

Invertebrate Biology Pub Date : 2021-04-06 DOI: 10.1111/ivb.12314

Timothy S. Wood

{"title":"Digestion and nutrition in freshwater bryozoans (Phylactolaemata)","authors":"Timothy S. Wood","doi":"10.1111/ivb.12314","DOIUrl":"10.1111/ivb.12314","url":null,"abstract":"As suspension feeders, freshwater bryozoans (Phylactolaemata) ingest a wide variety of particles. After this material is processed in the gut, the remaining wastes are ejected in a pellet. Curiously, fecal pellet contents appear perfectly intact, often still alive, and apparently unharmed. This raises questions about the true sources of bryozoan nutrition and the entire digestive process itself. This article summarizes the results of controlled feeding experiments as well as findings from gut examination by scanning electron microscopy. Extensive feeding tests with bryozoan species in three families show that colonies ingesting protozoans and small rotifers grow much faster than those on any other diet. There is no evidence for digestion of green algae or bacteria, including cyanobacteria. Close observations reveal muscular contractions of the stomach crushing and abrading fragile prey organisms, with possible assistance from indigestible algal particles. A dense carpet of microvilli lines the walls of the stomach and intestine. In most instances, these are organized in a three-dimensional matrix that offers an extensive surface area. Because all food is handled in sequential batches, there is limited time for many particles to be digested.","PeriodicalId":54923,"journal":{"name":"Invertebrate Biology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/ivb.12314","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42765890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sexual reproduction in the soft coral Lobophytum schoedei in Bolinao-Anda Reef Complex, Pangasinan, northwestern Philippines 菲律宾西北部Pangasinan Bolinao - Anda礁群软珊瑚的有性生殖研究

IF 1.2 4区生物学

Invertebrate Biology Pub Date : 2021-04-02 DOI: 10.1111/ivb.12316

Christine C. Baran, Maria Vanessa Baria-Rodriguez

{"title":"Sexual reproduction in the soft coral Lobophytum schoedei in Bolinao-Anda Reef Complex, Pangasinan, northwestern Philippines","authors":"Christine C. Baran, Maria Vanessa Baria-Rodriguez","doi":"10.1111/ivb.12316","DOIUrl":"10.1111/ivb.12316","url":null,"abstract":"The characterization of early life-history strategies of soft corals is important in understanding population maintenance, replenishment, and recovery in disturbed coral reefs. This study examined the sexual reproduction of the soft coral Lobophytum schoedei in the Bolinao-Anda Reef Complex (BARC), a degraded reef in northwestern Philippines. Reproductive strategies such as sexuality, sex ratio, fecundity, and reproductive timing were examined. Random colonies of L. schoedei were sampled a few weeks before the predicted time of spawning to assess fecundity (n = 73 colonies), and sexuality and sex ratio (n = 221 colonies). Monthly sampling of tagged colonies of L. schoedei (n = 20) was done over 13 months to determine the reproductive timing through polyp dissection. Peak of annual spawning was inferred based on the presence of large gametes and their absence in the next sampling period. Results showed that L. schoedei is a gonochoric broadcast spawner with 1:1.1 sex ratio. Although oogenesis and spermatogenesis exhibited overlapping cycles, both gametes matured and spawned in April, coinciding with increasing sea surface temperature. Prior to spawning, oocytes and spermaries ranged 300–633 µm and 150–337 µm in diameter, respectively. Mean female fecundity was 6.7 ± 3.9 oocytes per polyp and male fecundity was 39.2 ± 22.5 (±SD) spermaries per polyp. Some of these results, including the low number of oocytes produced by female polyps, may be caused by sexual reproduction in a degraded reef environment. Understanding these reproductive traits may be useful for predicting the resiliency of populations of L. schoedei in response to ongoing and future environmental change.","PeriodicalId":54923,"journal":{"name":"Invertebrate Biology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/ivb.12316","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48023432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Student-led field studies of herbivory: Hands-on experiences for remote (or in-person) learning 学生主导的草食学实地研究:远程(或亲自)学习的实践经验

IF 1.2 4区生物学

Invertebrate Biology Pub Date : 2021-04-01 DOI: 10.1111/ivb.12320

Sarah K. Berke, Rebecca M. Clark

引用次数: 4

Integrating microscopy, art, and humanities to power STEAM learning in biology 将显微镜、艺术和人文学科相结合，为STEAM生物学学习提供动力

IF 1.2 4区生物学

Invertebrate Biology Pub Date : 2021-03-24 DOI: 10.1111/ivb.12327

Sara M. Lindsay

引用次数: 6

So you have to teach invertebrate biology… 所以你必须教无脊椎动物生物学……

IF 1.2 4区生物学

Invertebrate Biology Pub Date : 2021-03-16 DOI: 10.1111/ivb.12330

A. Richard Palmer

引用次数: 0

Innovation in teaching and learning invertebrate zoology in remote and online classrooms 在远程和在线课堂上教授和学习无脊椎动物动物学的创新

IF 1.2 4区生物学

Invertebrate Biology Pub Date : 2021-03-16 DOI: 10.1111/ivb.12329

Elizabeth C. Davis-Berg, Kevin M. Kocot

引用次数: 2

Reproduction in the tropical frilly sea anemone Phymanthus pinnulatus (Cnidaria, Actiniaria) 热带褶边海葵Phymanthus pinnulatus(刺胞目，Actiniaria)的繁殖

IF 1.2 4区生物学

Invertebrate Biology Pub Date : 2021-03-16 DOI: 10.1111/ivb.12313

Clara Lei Xin Yong, Nicholas Wei Liang Yap, Koh Siang Tan, Danwei Huang

{"title":"Reproduction in the tropical frilly sea anemone Phymanthus pinnulatus (Cnidaria, Actiniaria)","authors":"Clara Lei Xin Yong, Nicholas Wei Liang Yap, Koh Siang Tan, Danwei Huang","doi":"10.1111/ivb.12313","DOIUrl":"10.1111/ivb.12313","url":null,"abstract":"Our understanding of how sea anemones reproduce in the equatorial Central Indo-Pacific region remains poor compared to other marine regions. Here we report the gametogenic cycles of Phymanthus pinnulatus, a zooxanthellate sea anemone found throughout the Indo-Pacific tropics. Observations were based on 41 individuals collected in Singapore. We found P. pinnulatus to be gonochoric, with an equal sex ratio of 1:1. Phases of oogenesis and spermatogenesis were detailed for the first time in P. pinnulatus, and were consistent with phases in other actiniarians. Females with pedal disc diameters <10 mm were found to asynchronously produce oocytes. We also found that trophonemata were associated with both oocytes and spermaries during gametogenesis. In Singapore, the periods during which gametes matured in each sex of P. pinnulatus appeared to overlap. We were unable distinguish whether spawning was annual or continuous in P. pinnulatus. Our observations on the occurrence of maturing and matured gametes in P. pinnulatus were similar to those reported for other species within the Central Indo-Pacific. It also coincided with the multispecies spawning of scleractinian corals in Singapore. This study contributes to the growing body of work focused on the biology of tropical actiniarians in the Central Indo-Pacific region.","PeriodicalId":54923,"journal":{"name":"Invertebrate Biology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/ivb.12313","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47325137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0