Latin American Journal of Aquatic Mammals最新文献_第7页

Intensive feeding of humpback whales (Megaptera novaeangliae) in the breeding ground of Banderas Bay, Mexico 墨西哥班德拉斯湾繁殖地的座头鲸(Megaptera novaeangliae)的密集摄食

Latin American Journal of Aquatic Mammals Pub Date : 2019-09-29 DOI: 10.5597/00251

A. Frisch‐Jordán, N. Ransome, Oscar S. Aranda-Mena, Fernando Romo-Sirvent

{"title":"Intensive feeding of humpback whales (Megaptera novaeangliae) in the breeding ground of Banderas Bay, Mexico","authors":"A. Frisch‐Jordán, N. Ransome, Oscar S. Aranda-Mena, Fernando Romo-Sirvent","doi":"10.5597/00251","DOIUrl":"https://doi.org/10.5597/00251","url":null,"abstract":"Banderas Bay, located in the Mexican Pacific, is a breeding/calving ground for the North Pacific stock of humpback whales (Megaptera novaeangliae) during the winter. While sporadic registers of humpback whales feeding on their mating grounds exist, this is the first occasion where feeding activity was observed intensively and extensively on a breeding ground. Between 19 December 2011 and 6 March 2012, 26 such occurrences were registered in Banderas Bay, along the mainland pacific coast. On five occasions, groups of 20 or more individuals were recorded feeding. They were feeding over and under the surface using lunging and gulping techniques. On several occasions humpbacks were observed feeding alongside Bryde´s whales (Balaenoptera edeni), Pantropical spotted dolphins (Stenella attenuata) and Bottlenose dolphins (Tursiops truncatus). Two different samples of fish at two different feeding sites were taken and the fish identifications showed these were Pacific anchovies (Cetengraulis mysticetus). Among the 26 sightings, nine different species of birds were registered feeding in the same area as the humpback whales. The number of whales feeding over an extended period of time in their breeding ground could be an indicator that there was not enough food in their feeding grounds, but the possibility that they might just be taking advantage of good food availability is also possible.","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78767123","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: 5

First stranding record of Kogia sima (Owen, 1866) in the Colombian Caribbean 首次在哥伦比亚加勒比海搁浅的科吉亚斯马(欧文，1866年)

Latin American Journal of Aquatic Mammals Pub Date : 2019-09-29 DOI: 10.5597/00250

Maria A. Mutis, A. Polanco

{"title":"First stranding record of Kogia sima (Owen, 1866) in the Colombian Caribbean","authors":"Maria A. Mutis, A. Polanco","doi":"10.5597/00250","DOIUrl":"https://doi.org/10.5597/00250","url":null,"abstract":"The dwarf sperm whale, Kogia sima, is one of the lesser known Odontoceti species, in spite of its worldwide distribution, and is considered rare due to the difficult identification in the field. Detailed information is scarce and mostly comes from stranding events or bycatch animals, just a few sightings correspond to live specimens. In the Caribbean Basin, the species has been reported in the Lesser Antilles, Mexico, Honduras, Costa Rica and Venezuela. We present the first stranding record of Kogia sima in the Colombian Caribbean coast from a pregnant female in Mendihuaca region, Magdalena Department. The specimen showed no fishing or entanglement lines whatsoever, and the overall condition was good. Morphological measurements were taken and the confirmation of the species was made from the following features: body length, height and position of dorsal fin, position of blowhole, and number of teeth in the lower jaw. The record of the adult specimen is documented in the System of Information of Marine Biodiversity of Colombia –SIBM and the fetus is deposited in the Mammal collection of the Museum of Marine Natural History of Colombia –MAKURIWA under the catalogue number INV-MAM004.","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87627310","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: 3

To eat or not to eat: ingestion and avoidance of fecal content from communal latrines of Lontra longicaudis (Olfers, 1818) 吃或不吃:Lontra longicaudis公共厕所粪便的摄入和避免(Olfers, 1818)

Latin American Journal of Aquatic Mammals Pub Date : 2019-09-29 DOI: 10.5597/00248

I. C. Laurentino, R. M. Sousa, G. Corso, R. Sousa-lima

{"title":"To eat or not to eat: ingestion and avoidance of fecal content from communal latrines of Lontra longicaudis (Olfers, 1818)","authors":"I. C. Laurentino, R. M. Sousa, G. Corso, R. Sousa-lima","doi":"10.5597/00248","DOIUrl":"https://doi.org/10.5597/00248","url":null,"abstract":"Communal latrines have important biological and ecological roles for the latrine builder species and for other taxa that visit these sites and use feces to obtain nutrients and microorganisms that aid in digestion of compounds hard to process. Nonetheless, coprophagous animals must deal with the costs associated with parasites and other pathogenspresent in latrines. Parasites and pathogens are found in Neotropical otter latrines. This species is carnivorous and uses latrines for territorial marking. The objective of this study was to identify vertebrate species associated with otter latrines and species that use feces as food resource. Latrines were monitored with camera traps on a monthly basis in 24-hour cycles. We recorded nine species of vertebrates, including birds, reptiles and mammals, visiting the latrines. Feeding dependency from latrines in the Atlantic Forest may not be related to periods of low food availability (dry season). Visitors that ate at the latrines do not have the same feeding habits as otters. The assumption that mammals would avoid ingesting disease-loaded feces from latrines did not hold, since two mammal species did. We speculate these mammals might be more resistant or less susceptible to pathogens found in otter feces.","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87288447","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: 1

Rare and antagonistic interactions between short-finned pilot whales (Globicephala macrorhynchus and fasting humpback whales (Megaptera novaeangliae) off Western Puerto Rico 波多黎各西部海域，短鳍领航鲸(Globicephala macrohynchus)和禁食座头鲸(Megaptera novaeangliae)之间罕见的拮抗相互作用

Latin American Journal of Aquatic Mammals Pub Date : 2019-09-29 DOI: 10.5597/00252

M. M. Mackay, Cathy Bacon

引用次数: 1

New non-breeding colonies of the South American fur seal in central Chile. Is the distribution in the southeastern Pacific waters extending? 智利中部南美海狗的新非繁殖地。东南太平洋水域的分布是否在扩大?

Latin American Journal of Aquatic Mammals Pub Date : 2019-09-29 DOI: 10.5597/lajam00249

Daniela Carcamo, M. Pizarro, Muriel Orellana, Guido Pavez, L. Durán, Doris Oliva

{"title":"New non-breeding colonies of the South American fur seal in central Chile. Is the distribution in the southeastern Pacific waters extending?","authors":"Daniela Carcamo, M. Pizarro, Muriel Orellana, Guido Pavez, L. Durán, Doris Oliva","doi":"10.5597/lajam00249","DOIUrl":"https://doi.org/10.5597/lajam00249","url":null,"abstract":"The South American fur seal (SAFS), Arctocephalus australis, has an estimated abundance of 219,000 individuals. The distribution range of this top marine predator along the Pacifc coast of South America is discontinuous, with a gap between 29°02’S-43°36’S, whereas the Atlantic coast presents a continuous distribution. Little is known aboutthe population dynamics of the species in Chile, as there have been few observations of vagrant individuals within the distribution gap and partial population censuses on dates that do not fit with the reproductive season in northern andsouthern Chile. The aim of this study is to identify the presence of A. australis colonies and summarize the sightings in central Chile. Aerial censuses were performed between 32°12’S-39°24’S during the austral winter and summer (2015) and between 41°44’S-44°55’S during summer (2013, 2016-2018). Official stranding records were also included to complementthe research sightings. We registered a total of 54 SAFS in the Chilean distribution gap, most of them during winter (89%) and with a higher proportion of females (72%). Two non-breeding colonies were found in the Biobío Region during the winter of 2015, Islote del Trabajo (38°25’S) and Islote Quechol (38°26’S), with 27 ± 1 and 16 ± 0 individuals, respectively. The sightings of adult individuals suggest their arrival at these latitudes to carry out foraging and resting activities, probably from Guafo Island (43°36’S). The last Pleistocene glaciation, hunting activities during the eighteenth century and ENSO events could have conditioned the current abundance and range of distribution of A. australis in South America; therefore, the establishment of new non-breeding colonies in the gap of distribution could lead to new breeding grounds in thefuture.","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79748498","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: 5

First stranding record of a Cuvier’s beaked whale (Ziphius cavirostris) on the island of Barbuda, Eastern Caribbean 居维叶喙鲸(ziphus cavirostris)在东加勒比海巴布达岛的首次搁浅记录

Latin American Journal of Aquatic Mammals Pub Date : 2019-02-21 DOI: 10.5597/00245

Wojtek Bachara, Martha Watkins Gilkes, Jaime Bolaños‐Jiménez, A. Mignucci-Giannoni

引用次数: 0

Cetacean sightings in Puerto Rican waters: including the first underwater photographic documentation of a minke whale (Balaenoptera acutorostrata) 在波多黎各水域看到鲸类动物:包括小须鲸(Balaenoptera acutorostrata)的第一个水下摄影记录

Latin American Journal of Aquatic Mammals Pub Date : 2019-02-21 DOI: 10.5597/00246

G. Rodriguez-Ferrer, Roberto C. Reyes, N. Hammerman, J. E. García-Hernández

引用次数: 1

The use of underwater viewing deck of the semi-submersible whalewatching vessel Yellow Submarine at Península Valdés, Argentina as a platform of opportunity for scientifc research with the southern right whale, Eubalaena australis 在阿根廷Península vald<s:1>的半潜式观鲸船“黄色潜水艇”的水下观景甲板上，为南露脊鲸(Eubalaena australis)的科学研究提供了机会

Latin American Journal of Aquatic Mammals Pub Date : 2019-02-21 DOI: 10.5597/00242

M. Sironi, L. Alzugaray, A. Sáez, Florencia O. Vilches, A. Ajó, Paula Faiferman

{"title":"The use of underwater viewing deck of the semi-submersible whalewatching vessel Yellow Submarine at Península Valdés, Argentina as a platform of opportunity for scientifc research with the southern right whale, Eubalaena australis","authors":"M. Sironi, L. Alzugaray, A. Sáez, Florencia O. Vilches, A. Ajó, Paula Faiferman","doi":"10.5597/00242","DOIUrl":"https://doi.org/10.5597/00242","url":null,"abstract":"Whale-watching vessels can be used as platforms to collect scientific data on the natural history of cetaceans. Vessels with underwater viewing decks are exceptional and offer a unique view of the whales. We assessed the underwater viewing platform of the semi-submersible vessel Yellow Submarine that operates off Puerto Pirámides, Península Valdés, Argentina as a platform of opportunity for southern right whale (Eubalaena australis) research. The variables considered during observations included, among others, the age class and sex of the animals observed, behavioral patterns, opportunities for individual photo-identification, distance and duration of the underwater observations and how weather conditions affected data collection. The Yellow Submarine offers a unique platform to make underwater observations of southern right whales in this calving ground. The main limitations are the relatively short duration of the observations and reduced visibility in spring.","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90428567","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: 1

Opportunistic feeding experiment in a captive franciscana (Pontoporia blainvillei): assessing gastrointestinal transit time and gastric digestion. 圈养方济鱼机会饲养试验:胃肠运输时间和胃消化的影响。

Latin American Journal of Aquatic Mammals Pub Date : 2019-02-21 DOI: 10.5597/00244

M. Bassoi, J. G. Shepard, E. Secchi

引用次数: 4

Tough life: the case of a young coastal common bottlenose dolphin repeatedly entangled 艰难的生活:一只年轻的海岸普通宽吻海豚反复纠缠的情况

Latin American Journal of Aquatic Mammals Pub Date : 2019-02-21 DOI: 10.5597/00243

F. Félix, Oscar Vázcones, Ruby Centeno, J. Romero

引用次数: 5