{"title":"Plankton: A Worldwide Guide By Tom Jackson and Jennifer Parker. Andrew Hirst, Ed. Princeton University Press. 2024. 224 pp. ISBN 978–0–691-25599-6, US$29.95 (Hardcover); ISBN 978–0–691-25608-5, US$20.97 (eBook)","authors":"Jaime Gómez-Gutiérrez","doi":"10.1111/mms.13182","DOIUrl":"https://doi.org/10.1111/mms.13182","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"40 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142429394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sex in Cetaceans: Morphology, Behavior, and the Evolution of Sexual Strategies , Bernd Würsig and Dara N. Orbach, Eds. Springer Nature. 2023. 619 pp. ISBN: 978–3–031-35650-6, US$59.99 (Hardcover); ISBN 978–3–031-35653-7, US$49.00 (Softcover); ISBN 978–3–031-35651-3 (Open access eBook). https://doi.org/10.1007/978-3-031-35651-3","authors":"Diane Gendron","doi":"10.1111/mms.13183","DOIUrl":"https://doi.org/10.1111/mms.13183","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"40 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142429187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jeanne M. Shearer, Heather J. Foley, Zachary T. Swaim, Vincent M. Janik, Andrew J. Read
Some humpback whales from the Northwestern Atlantic population forgo migration to the Caribbean, spending winter months feeding along the U.S. mid‐Atlantic coast. We studied the foraging behavior of these whales at the mouth of the Chesapeake Bay, Virginia during winter from 2017 to 2022. While shipping channels here reach depths of up to 30 m, most of the area is 11–15 m deep. This shallow‐water environment poses physical constraints on classical humpback whale feeding modes. We deployed 20 digital acoustic tags (DTAGs) on humpback whales and identified foraging lunges from accelerometer data, detecting 788 lunges from 10 animals. Tagged whales averaged a single lunge per dive, lunging primarily in a horizontal orientation, with limited maneuvering compared to other study sites. Our results indicate that some elements of humpback whale foraging behavior are conserved across environments, but that the shallow depths in our study area constrain how animals are able to feed. The relatively high lunge rates we observed suggest this area is an important foraging ground. However, foraging in shipping channels increases the risk of ship strikes, which frequently occur in this area.
{"title":"Overwintering humpback whales adapt foraging strategies to shallow water environments at the mouth of the Chesapeake Bay, Virginia, USA","authors":"Jeanne M. Shearer, Heather J. Foley, Zachary T. Swaim, Vincent M. Janik, Andrew J. Read","doi":"10.1111/mms.13184","DOIUrl":"https://doi.org/10.1111/mms.13184","url":null,"abstract":"Some humpback whales from the Northwestern Atlantic population forgo migration to the Caribbean, spending winter months feeding along the U.S. mid‐Atlantic coast. We studied the foraging behavior of these whales at the mouth of the Chesapeake Bay, Virginia during winter from 2017 to 2022. While shipping channels here reach depths of up to 30 m, most of the area is 11–15 m deep. This shallow‐water environment poses physical constraints on classical humpback whale feeding modes. We deployed 20 digital acoustic tags (DTAGs) on humpback whales and identified foraging lunges from accelerometer data, detecting 788 lunges from 10 animals. Tagged whales averaged a single lunge per dive, lunging primarily in a horizontal orientation, with limited maneuvering compared to other study sites. Our results indicate that some elements of humpback whale foraging behavior are conserved across environments, but that the shallow depths in our study area constrain how animals are able to feed. The relatively high lunge rates we observed suggest this area is an important foraging ground. However, foraging in shipping channels increases the risk of ship strikes, which frequently occur in this area.","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"99 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142263900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pinnipeds have vibrissae with which they can explore their environment. Two vibrissal parameters that differ in pinnipeds are shape and number. Regarding shape, most phocids have undulated vibrissae, whereas the vibrissae of a few phocids, all otariids and walruses are smooth. As there is disagreement with respect to which phocid vibrissae lack the undulation, we systematically collected information on vibrissal type. We have documented that all eared seals we examined, walruses, Mediterranean monk seals, bearded, and leopard seals have smooth vibrissae. All other phocids have undulated vibrissae, except for Ross seals and Hawaiian monk seals, which have partially undulated vibrissae. Moreover, we quantified and documented the existence of vibrissae from photos revealing otariids to have 20–43 mystacial vibrissae/pad, no rhinal vibrissae, 1–2 supraorbital vibrissae above each eye, and phocids to have 15–97 mystacial vibrissae/pad, 0–2 rhinal vibrissae/nostril, 1–9 supraorbital vibrissae above each eye, all averages determined from counts made from photos. Walruses have the maximum number of mystacial vibrissae amounting to 198 vibrissae/pad on average, but almost all walruses lack rhinal and supraorbital vibrissae. Vibrissae were found at the upper lip and on the lower jaw in some pinnipeds.
{"title":"Characterization of pinniped vibrissal type and number","authors":"Katharina Morgenthal, Yvonne Krüger, Tracey Rogers, Guido Dehnhardt, Frederike D. Hanke","doi":"10.1111/mms.13166","DOIUrl":"https://doi.org/10.1111/mms.13166","url":null,"abstract":"Pinnipeds have vibrissae with which they can explore their environment. Two vibrissal parameters that differ in pinnipeds are shape and number. Regarding shape, most phocids have undulated vibrissae, whereas the vibrissae of a few phocids, all otariids and walruses are smooth. As there is disagreement with respect to which phocid vibrissae lack the undulation, we systematically collected information on vibrissal type. We have documented that all eared seals we examined, walruses, Mediterranean monk seals, bearded, and leopard seals have smooth vibrissae. All other phocids have undulated vibrissae, except for Ross seals and Hawaiian monk seals, which have partially undulated vibrissae. Moreover, we quantified and documented the existence of vibrissae from photos revealing otariids to have 20–43 mystacial vibrissae/pad, no rhinal vibrissae, 1–2 supraorbital vibrissae above each eye, and phocids to have 15–97 mystacial vibrissae/pad, 0–2 rhinal vibrissae/nostril, 1–9 supraorbital vibrissae above each eye, all averages determined from counts made from photos. Walruses have the maximum number of mystacial vibrissae amounting to 198 vibrissae/pad on average, but almost all walruses lack rhinal and supraorbital vibrissae. Vibrissae were found at the upper lip and on the lower jaw in some pinnipeds.","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"13 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Beaked whales have recently been reported in the South China Sea but with taxonomic uncertainty due to their ambiguous morphological features. Here, we sequenced three genetic markers, the control region (CR) and cytochrome b (cytb) of the mitochondrial genome and the first intron of the nuclear muscle actin gene ACTA2, of two biopsy samples collected in 2021, and revealed unambiguous clustering with sequences previously attributed to Deraniyagala's beaked whale (Mesoplodon hotaula). Phylogenetic analysis of complete mitogenomes strongly supported the close relationship between the Deraniyagala's beaked whale and the ginkgo‐toothed beaked whale (M. ginkgodens). Whole‐genome sequencing suggested a high degree of heterozygosity in the Deraniyagala's beaked whale. Ancient inbreeding may have had a greater impact than the recent inbreeding on Deraniyagala's beaked whales, but more samples are needed to draw a firm conclusion. The approximate effective population size of Deraniyagala's beaked whale was found lowest among seven examined ziphiids, which has been experiencing a steady decline since ~300,000 ya. Therefore, we suggest that the conservation status of Deraniyagala's beaked whales should be assessed when essential information is available. The results of our study provide genetic evidence of the live sighting of Deraniyagala's beaked whale in the South China Sea and are fundamental to understanding the morphological, behavioral, and ecological perspectives of this cetacean species.
{"title":"The first genetically confirmed live sighting of the Deraniyagala's beaked whale (Mesoplodon hotaula), with insights into the diversity, phylogeny, and past demographic history","authors":"Wenzhi Lin, Hui Kang, Inge Seim, Binshuai Liu, Shenglan Chen, Mingming Liu, Lijun Dong, Mingli Lin, Yuhang Song, Mingyue Ouyang, Xiaoyu Huang, Yingxue Gao, Zixin Yang, Yaolei Zhang, Jiahao Wang, Guangyi Fan, Songhai Li","doi":"10.1111/mms.13180","DOIUrl":"https://doi.org/10.1111/mms.13180","url":null,"abstract":"Beaked whales have recently been reported in the South China Sea but with taxonomic uncertainty due to their ambiguous morphological features. Here, we sequenced three genetic markers, the control region (CR) and cytochrome <jats:italic>b</jats:italic> (<jats:italic>cytb</jats:italic>) of the mitochondrial genome and the first intron of the nuclear muscle actin gene <jats:italic>ACTA2</jats:italic>, of two biopsy samples collected in 2021, and revealed unambiguous clustering with sequences previously attributed to Deraniyagala's beaked whale (<jats:italic>Mesoplodon hotaula</jats:italic>). Phylogenetic analysis of complete mitogenomes strongly supported the close relationship between the Deraniyagala's beaked whale and the ginkgo‐toothed beaked whale (<jats:italic>M. ginkgodens</jats:italic>). Whole‐genome sequencing suggested a high degree of heterozygosity in the Deraniyagala's beaked whale. Ancient inbreeding may have had a greater impact than the recent inbreeding on Deraniyagala's beaked whales, but more samples are needed to draw a firm conclusion. The approximate effective population size of Deraniyagala's beaked whale was found lowest among seven examined ziphiids, which has been experiencing a steady decline since ~300,000 ya. Therefore, we suggest that the conservation status of Deraniyagala's beaked whales should be assessed when essential information is available. The results of our study provide genetic evidence of the live sighting of Deraniyagala's beaked whale in the South China Sea and are fundamental to understanding the morphological, behavioral, and ecological perspectives of this cetacean species.","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"61 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Alejandra Romero, Laura Flórez, Matías Ocampo Reinaldo, Rodrigo Machado, Marina Coller, Enrique A. Crespo
Bycatch is recognized as the primary threat to the viability of marine mammal populations. Given that bycatch levels display strong variations in space and time, knowledge of individual fishery‐marine mammal interaction will likely achieve working solutions. Here, we quantify marine mammal bycatch in the trawl fishery of the San Matías Gulf, Argentina, for the first time using data from onboard observers and fishing effort records. We infer expected annual mortality, evaluate the probability of exceeding conservation thresholds, and explore the importance of relevant covariates to account for broadscale differences in bycatch rates. The South American sea lion (Otaria byronia) was the most incidentally caught species (46 individuals), while only one common dolphin (Delphinus delphis) was taken. Bycatch of sea lions was primarily associated with the catch of the target species, proximity to colonies, and the identity of the target species. The maximum estimated bycatch rate was 0.12 animals/haul and 0.08 animals/tonne of target species landed, with significantly higher bycatch rates observed in the hake fleet. For the whole period, the annual bycatch mortality were below the reference points. Our findings highlight potential hotspots of marine mammal bycatch and provide valuable insights for refining future mitigation measures and enhancing conservation efforts.
{"title":"Bycatch in the balance: the trawl fisheries impact on South American sea lions in San Matias Gulf, with comments on other species","authors":"M. Alejandra Romero, Laura Flórez, Matías Ocampo Reinaldo, Rodrigo Machado, Marina Coller, Enrique A. Crespo","doi":"10.1111/mms.13181","DOIUrl":"https://doi.org/10.1111/mms.13181","url":null,"abstract":"Bycatch is recognized as the primary threat to the viability of marine mammal populations. Given that bycatch levels display strong variations in space and time, knowledge of individual fishery‐marine mammal interaction will likely achieve working solutions. Here, we quantify marine mammal bycatch in the trawl fishery of the San Matías Gulf, Argentina, for the first time using data from onboard observers and fishing effort records. We infer expected annual mortality, evaluate the probability of exceeding conservation thresholds, and explore the importance of relevant covariates to account for broadscale differences in bycatch rates. The South American sea lion (<jats:italic>Otaria byronia</jats:italic>) was the most incidentally caught species (46 individuals), while only one common dolphin (<jats:italic>Delphinus delphis</jats:italic>) was taken. Bycatch of sea lions was primarily associated with the catch of the target species, proximity to colonies, and the identity of the target species. The maximum estimated bycatch rate was 0.12 animals/haul and 0.08 animals/tonne of target species landed, with significantly higher bycatch rates observed in the hake fleet. For the whole period, the annual bycatch mortality were below the reference points. Our findings highlight potential hotspots of marine mammal bycatch and provide valuable insights for refining future mitigation measures and enhancing conservation efforts.","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"11 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mingming Liu, Wenzhi Lin, Binshuai Liu, Shenglan Chen, Mingli Lin, Lijun Dong, Hui Kang, Mingyue Ouyang, Zixin Yang, Xiaoyu Huang, Massimiliano Rosso, L. Todd Pusser, John Y. Wang, Robert L. Pitman, Songhai Li
Deraniyagala's beaked whale, Mesoplodon hotaula, was previously known from eight published strandings and no confirmed live sightings, making it one of the least‐known cetaceans. We conducted six cetacean survey cruises in the South China Sea between 2019 and 2023, and during 120 sea‐days we recorded 12 sightings of unidentified Mesoplodon. From biopsy samples and acoustic recordings, five sightings were subsequently confirmed as M. hotaula. Using photographs, we provide the first field descriptions and observations of this species. The calf/juvenile has a distinctive facial coloration and dorsal striping pattern that appear to be diagnostic among Indo‐Pacific Mesoplodon; among adult males, the dark rostrum of M. hotaula and the distinctively white‐tipped beak of ginkgo‐toothed beaked whale, M. ginkgodens, distinguish these similar‐looking, partially sympatric species. Mean group size was small (3.0, n = 5), with a preference for deep (2,156 m, n = 5), warm (30.3°C, n = 3) water. We update the known distribution of this species, present evidence of fishery interactions, and document the first reported mixed‐species Mesoplodon group: a juvenile Blainville's beaked whale M. densirostris associated with four M. hotaula. These sightings identify the South China Sea as a potentially important area for this almost completely unknown species.
{"title":"Observations on Deraniyagala's beaked whale (Mesoplodon hotaula) in the South China Sea based on the first confirmed live sightings","authors":"Mingming Liu, Wenzhi Lin, Binshuai Liu, Shenglan Chen, Mingli Lin, Lijun Dong, Hui Kang, Mingyue Ouyang, Zixin Yang, Xiaoyu Huang, Massimiliano Rosso, L. Todd Pusser, John Y. Wang, Robert L. Pitman, Songhai Li","doi":"10.1111/mms.13178","DOIUrl":"https://doi.org/10.1111/mms.13178","url":null,"abstract":"Deraniyagala's beaked whale, <jats:italic>Mesoplodon hotaula</jats:italic>, was previously known from eight published strandings and no confirmed live sightings, making it one of the least‐known cetaceans. We conducted six cetacean survey cruises in the South China Sea between 2019 and 2023, and during 120 sea‐days we recorded 12 sightings of unidentified <jats:italic>Mesoplodon</jats:italic>. From biopsy samples and acoustic recordings, five sightings were subsequently confirmed as <jats:italic>M. hotaula.</jats:italic> Using photographs, we provide the first field descriptions and observations of this species. The calf/juvenile has a distinctive facial coloration and dorsal striping pattern that appear to be diagnostic among Indo‐Pacific <jats:italic>Mesoplodon</jats:italic>; among adult males, the dark rostrum of <jats:italic>M. hotaula</jats:italic> and the distinctively white‐tipped beak of ginkgo‐toothed beaked whale, <jats:italic>M. ginkgodens</jats:italic>, distinguish these similar‐looking, partially sympatric species. Mean group size was small (3.0, <jats:italic>n</jats:italic> = 5), with a preference for deep (2,156 m, <jats:italic>n</jats:italic> = 5), warm (30.3°C, <jats:italic>n</jats:italic> = 3) water. We update the known distribution of this species, present evidence of fishery interactions, and document the first reported mixed‐species <jats:italic>Mesoplodon</jats:italic> group: a juvenile Blainville's beaked whale <jats:italic>M. densirostris</jats:italic> associated with four <jats:italic>M. hotaula.</jats:italic> These sightings identify the South China Sea as a potentially important area for this almost completely unknown species.","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"57 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Deraniyagala's beaked whale (Mesoplodon hotaula) is one of the least‐known beaked whale species, with only a few of possible live sightings being documented to date. Here, vocalizations of Deraniyagala's beaked whales were recorded using drifting recording systems in the confirmed presence of this whale in the northern South China Sea (SCS) in 2021. A total of 699 qualified frequency‐modulated (FM) pulses were used to calculate frequency and duration measurements. FM pulses had a median peak frequency of 43.3 kHz and median interpulse interval (IPI) of 244.6 ms. Both the spectra measurements and clustering analysis showed the recorded clicks closely resemble the clicks of beaked whales at Palmyra Atoll (presumed to belong to Deraniyagala's beaked whale). Compared with other Ziphiidae species, interspecific differences were also observed. Distinguishing between Deraniyagala's and ginkgo‐toothed (M. ginkgodens) beaked whales with acoustic data sets seems to prove feasible. Our results also suggested that Deraniyagala's beaked whales may produce more than one subtype of FM pulses. This study presents the first description of echolocation clicks produced by this species based on the confirmed visual sightings. It is beneficial to identify the species in passive acoustic monitoring records and gain further insight into this species' vocalizations.
{"title":"Echolocation signals recorded in the presence of Deraniyagala's beaked whales (Mesoplodon hotaula) in the western Pacific (South China Sea) indicate species‐specificity and intraspecific variation","authors":"Lijun Dong, Yuhang Song, Wenzhi Lin, Mingming Liu, Mingli Lin, Songhai Li","doi":"10.1111/mms.13179","DOIUrl":"https://doi.org/10.1111/mms.13179","url":null,"abstract":"Deraniyagala's beaked whale (<jats:italic>Mesoplodon hotaula</jats:italic>) is one of the least‐known beaked whale species, with only a few of possible live sightings being documented to date. Here, vocalizations of Deraniyagala's beaked whales were recorded using drifting recording systems in the confirmed presence of this whale in the northern South China Sea (SCS) in 2021. A total of 699 qualified frequency‐modulated (FM) pulses were used to calculate frequency and duration measurements. FM pulses had a median peak frequency of 43.3 kHz and median interpulse interval (IPI) of 244.6 ms. Both the spectra measurements and clustering analysis showed the recorded clicks closely resemble the clicks of beaked whales at Palmyra Atoll (presumed to belong to Deraniyagala's beaked whale). Compared with other Ziphiidae species, interspecific differences were also observed. Distinguishing between Deraniyagala's and ginkgo‐toothed (<jats:italic>M. ginkgodens</jats:italic>) beaked whales with acoustic data sets seems to prove feasible. Our results also suggested that Deraniyagala's beaked whales may produce more than one subtype of FM pulses. This study presents the first description of echolocation clicks produced by this species based on the confirmed visual sightings. It is beneficial to identify the species in passive acoustic monitoring records and gain further insight into this species' vocalizations.","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"11 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Renae Banfield, Daniele Cagnazzi, Nathan Johnston, Katherine L. Indeck
Acoustic communication is an important aspect of life for marine mammals, as their environment often limits the reliability of visual cues. However, there is little information regarding the acoustic communication and behavior of Australian snubfin dolphins (Orcaella heinsohni). This study was designed to determine if call rate and type were significantly affected by the behavioral state, group size, and cohesion of snubfin dolphins in the Fitzroy River in Queensland, Australia. We found that dolphins significantly modified both call rate (calls/hour/individual) and call type among behavioral states. For example, call rates were higher when dolphins were foraging versus resting or traveling. We also found that group size and cohesion had minimal effects on call rate, but significantly affected the predicted probabilities of call type production. For example, the probability ratio of burst pulse to whistle production is estimated to be highest when groups are widespread (>10 m), indicating the potential importance of burst pulses in maintaining contact between dispersed individuals. This study presents the first comprehensive analysis of snubfin dolphin communication under natural noise conditions in relation to behavioral context, which provides a foundation to explore how anthropogenic acoustic masking and behavioral disturbances may affect these dolphins in the future.
{"title":"Australian snubfin vocal activity is influenced by behavioral state and group characteristics","authors":"Renae Banfield, Daniele Cagnazzi, Nathan Johnston, Katherine L. Indeck","doi":"10.1111/mms.13173","DOIUrl":"https://doi.org/10.1111/mms.13173","url":null,"abstract":"Acoustic communication is an important aspect of life for marine mammals, as their environment often limits the reliability of visual cues. However, there is little information regarding the acoustic communication and behavior of Australian snubfin dolphins (<jats:italic>Orcaella heinsohni</jats:italic>). This study was designed to determine if call rate and type were significantly affected by the behavioral state, group size, and cohesion of snubfin dolphins in the Fitzroy River in Queensland, Australia. We found that dolphins significantly modified both call rate (calls/hour/individual) and call type among behavioral states. For example, call rates were higher when dolphins were foraging versus resting or traveling. We also found that group size and cohesion had minimal effects on call rate, but significantly affected the predicted probabilities of call type production. For example, the probability ratio of burst pulse to whistle production is estimated to be highest when groups are widespread (>10 m), indicating the potential importance of burst pulses in maintaining contact between dispersed individuals. This study presents the first comprehensive analysis of snubfin dolphin communication under natural noise conditions in relation to behavioral context, which provides a foundation to explore how anthropogenic acoustic masking and behavioral disturbances may affect these dolphins in the future.","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"22 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marc O. Lammers, Julia Zeh, Adam A. Pack, Eden Zang, Ed Lyman
{"title":"Humpback whale feeding behavior and defecation observed on the Hawaiian breeding grounds","authors":"Marc O. Lammers, Julia Zeh, Adam A. Pack, Eden Zang, Ed Lyman","doi":"10.1111/mms.13177","DOIUrl":"https://doi.org/10.1111/mms.13177","url":null,"abstract":"","PeriodicalId":18725,"journal":{"name":"Marine Mammal Science","volume":"24 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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