Journal of Cetacean Research and Management最新文献

Short Communication: Marine litter ingestion by a Bryde’s whale (Balaenoptera edeni) in Mindanao, Philippines, and the need for consistent long-term recording of single-individual strandings 简短的交流:菲律宾棉兰老岛布氏鲸(Balaenoptera edeni)的海洋垃圾摄入，以及对单个搁浅的持续长期记录的需要

Journal of Cetacean Research and Management Pub Date : 2023-09-27 DOI: 10.47536/jcrm.v24i1.403

Neil Angelo S. Abreo, Darrell D. Blatchley, Kirsten F. Thompson

引用次数: 0

Short Communication: First-documented humpback whale (Megaptera novaeangliae) photo-identification match and round-trip migration between Iceland and the Turks and Caicos Islands 简短的交流:首次记录的座头鲸(Megaptera novaeangliae)照片识别匹配和冰岛与特克斯和凯科斯群岛之间的往返迁徙

Journal of Cetacean Research and Management Pub Date : 2023-09-27 DOI: 10.47536/jcrm.v24i1.405

Cathy E. Bacon, Katharine A. Hart, Ted Cheeseman, Lee Munson, Marianne H. Rasmussen, Valerie Chosson, Charla J. Basran

引用次数: 0

Rescuing Ganges river dolphins (Platanista gangetica) from irrigation canals in Uttar Pradesh, North India, 2013-2020 2013-2020年，在印度北部北方邦的灌溉渠中营救恒河海豚

Journal of Cetacean Research and Management Pub Date : 2023-09-27 DOI: 10.47536/jcrm.v24i1.349

Shailendra Singh, Arunima Singh, Sreeparna Dutta, Sanjay Srivastava

引用次数: 0

Injuries in cetaceans in the Strait of Gibraltar: an update for the period 2016-2020 直布罗陀海峡鲸类动物的受伤情况:2016-2020年的最新情况

Journal of Cetacean Research and Management Pub Date : 2023-09-25 DOI: 10.47536/jcrm.v24i1.397

Eva-Maria Franziska Hanninger, Jörn Selling, Katharina Heyer, Patricia Burkhardt-Holm

{"title":"Injuries in cetaceans in the Strait of Gibraltar: an update for the period 2016-2020","authors":"Eva-Maria Franziska Hanninger, Jörn Selling, Katharina Heyer, Patricia Burkhardt-Holm","doi":"10.47536/jcrm.v24i1.397","DOIUrl":"https://doi.org/10.47536/jcrm.v24i1.397","url":null,"abstract":"The Strait of Gibraltar is an important habitat for seven regularly occurring cetacean species. These waters are heavily used for fishing and therefore experience extraordinary levels of shipping traffic. Photography provides a valuable and non‐invasive tool to monitor the health of cetacean populations, where external injuries may indicate specific anthropogenic impacts, such as vessel strikes or fishery interactions. We manually screened 27,866 photos taken during whale‐watching operations between 2016–20 for human‐induced injuries. Injuries of potential anthropogenic origin were detected in 228 cases. The severity of these injuries ranged from superficial linear marks to severe traumas that may affect survival and fitness. Severe injuries included a gunshot wound, vessel‐related traumata and abrasions, signs of previous severe entanglements and deep lacerations which could stem from recreational fishery activities or propellor cuts and occasionally served as an entry point for dermal infections. In 2007, Spanish legislation introduced regulations on how to approach cetaceans by boat, but recreational fishery vessels have been commonly observed to disregard this law. We therefore urge stricter control and enforcement of existing laws and collaboration between the Spanish and Moroccan authorities to mitigate the human impact on cetaceans in this region. KEYWORDS: CETACEANS, STRAIT OF GIBRALTAR, HUMAN IMPACT, WOUNDS, LACERATIONS, ENTANGLEMENTS","PeriodicalId":39929,"journal":{"name":"Journal of Cetacean Research and Management","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135817069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Southern Hemisphere Breeding Stock D humpback whale population estimates from North West Cape, Western Australia 南半球繁殖群D座头鲸数量估计从西开普省，西澳大利亚

Journal of Cetacean Research and Management Pub Date : 2023-02-09 DOI: 10.47536/jcrm.v12i1.588

Chandro Salgado Kent, Curt Jenner, Micheline Jenner, Philippe Bouchet, Eric Rexstad

{"title":"Southern Hemisphere Breeding Stock D humpback whale population estimates from North West Cape, Western Australia","authors":"Chandro Salgado Kent, Curt Jenner, Micheline Jenner, Philippe Bouchet, Eric Rexstad","doi":"10.47536/jcrm.v12i1.588","DOIUrl":"https://doi.org/10.47536/jcrm.v12i1.588","url":null,"abstract":"Estimates of the abundance of Breeding Stock D humpback whales (Megaptera novaeangliae) are key to the conservation and management of what is thought to be one of the largest populations of the species. Five years (2000, 2001, 2006, 2007 and 2008) of aerial surveys carried out over an eight-year period at North West Cape (Western Australia) using line transect methodology allowed trends in whale numbers to be investigated, and provided a base for comparison with estimates made approximately 400km south at Shark Bay (Western Australia). A total of 3,127 whale detections were made during 74 surveys of the 7,043km2 study area west of NWC. Pod abundance for each flight was computed using a HorvitzThompson like estimator and converted to an absolute measure of abundance after corrections were made for estimated mean cluster size, unsurveyed time, swimming speed and animal availability. Resulting estimates from the migration model of best fit with the most credible assumptions were 7,276 (CI = 4,993–10,167) for 2000, 12,280 (CI = 6,830–49,434) for 2001, 18,692 (CI = 12,980–24,477) for 2006, 20,044 (CI = 13,815–31,646) for 2007, and 26,100 (CI = 20,152–33,272) for 2008. Based on these data, the trend model with the greatest r2 was exponential with an annual increase rate of 13% (CI = 5.6%–18.1%). While this value is above the species’ estimated maximum plausible growth rate of 11.8%, it is reasonably close to previous reports of between 10–12%. The coefficient of variation, however, was too large for a reliable trend estimate. Perception bias was also not accounted for in these calculations. Based on a crude appraisal which yielded an estimated p(0) of 0.783 (from independent observer effort, CV = 0.973), the 2008 humpback population size may be as large as 33,300. In conclusion, the work here provides evidence of an increasing Breeding Stock D population, but further surveys are necessary to confirm whether the population is indeed increasing at its maximum rate.","PeriodicalId":39929,"journal":{"name":"Journal of Cetacean Research and Management","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136131616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23