Bryde’s whale (Balaenoptera edeni) in the southwestern Gulf of California: Relationship with ENSO variability and prey availability

Salvadeo, CJ; Flores-Ramírez, Sergio; MacLeod, C; Lluch-Belda, Daniel; Jaume-Schinkel, S

doi:10.7773/cm.v37i2.1840

Cited by 30 publications

(21 citation statements)

References 21 publications

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“…The Hauraki Gulf is an important habitat for the species (Wiseman 2008, Wiseman et al 2011), but it is also a region of high shipping transit, which results in whale mortality caused by vessel-strike injuries (Stockin et al 2008, Wiseman 2008, Behrens 2009, Riekkola 2013, Constantine et al 2015. Our estimates are precise, robust to the assumptions of the models and could be used in the future to examine population trajectories over time and the impact of ship strikes on the longterm persistence of the population.…”

Section: Discussionmentioning

confidence: 86%

“…In the Hauraki Gulf, it appears that there is a higher occurrence of whales during the austral winter (Wiseman et al 2011), although seasonality was not detected in a more recent study (Dwyer 2014). Bryde's whales in the Hauraki Gulf are subject to a high level of anthropogenic mortality, as evidenced by records of ship strikes and entanglements (Stockin et al 2008, Wiseman 2008, Riekkola 2013, Constantine et al 2015. From 1996 to 2014, a total of 44 whales were reported dead.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Local abundance, apparent survival and site fidelity of Bryde’s whales in the Hauraki Gulf (New Zealand) inferred from long-term photo-identification

Tezanos‐Pinto¹,

Hupman²,

Wiseman³

et al. 2017

Endang. Species. Res.

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Section: Discussionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Local abundance, apparent survival and site fidelity of Bryde’s whales in the Hauraki Gulf (New Zealand) inferred from long-term photo-identification

Tezanos‐Pinto¹,

Hupman²,

Wiseman³

et al. 2017

Endang. Species. Res.

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“…La Niña events have effects that are opposite to those of El Niño, although northern faunal intrusions into subtropical areas have seldom been reported [ 40 ]. In addition, ENSO impacts on prey availability have been documented for several marine mammal populations in the Northeast Pacific [ 41 – 44 ].…”

Section: Discussionmentioning

confidence: 99%

The Effect of Climate Variability on Gray Whales (Eschrichtius robustus) within Their Wintering Areas

Salvadeo¹,

Gómez-Gallardo²,

Nájera-Caballero³

et al. 2015

PLoS ONE

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The environmental conditions of the breeding and feeding grounds of the gray whale (Eschrichtius robustus) fluctuates at inter-annual scales in response to regional and basin climate patterns. Thus, the goals of this study were to assess if there are any relationships between summer sea ice on their feeding ground and counts of gray whale mother-calf (MC) pairs at Ojo de Liebre Lagoon (OLL); and if El Niño Southern Oscillation (ENSO) influences the winter distribution of gray whales MC pairs in the three primary breeding lagoons of OLL, San Ignacio Lagoon (SIL) and Santo Domingo Channel north of Bahia Magdalena (SDCh). Maximum February counts of MC pairs were compared with the length of the open-water season at the Bering Sea during the previous year. Then, an ENSO index and sea surface temperature anomalies outside the primary lagoons was compared with the maximum February counts of MC pairs at these lagoons. Results showed that maximum counts of MC pairs in OLL correlates with sea ice conditions in their feeding grounds from the previous feeding season, and this relationship can be attributed to changes in nutritive condition of females. ENSO-related variability influences distribution of MC pairs in the southern area of SDCh during the warm 1998 El Niño and cold 1999 La Niña. This supports the hypothesis that changes in the whales’ distribution related to sea temperature occurs to reduce thermal-stress and optimize energy utilization for newborn whales. Although this last conclusion should be considered in view of the limited data available from all the whales’ wintering locations in all the years considered.

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“…Salvadeo et al [56] analysed the sighting records of Bryde's whales and environmental variability. They identified that changes in the occurrence of Bryde's whales were related to the interannual variability in the SST and Chl a in La Paz Bay.…”

Section: Discussionmentioning

confidence: 99%

Chlorophyll a Concentration Distribution on the Mainland Coast of the Gulf of California, Mexico

et al. 2020

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Coastal zones are important areas for the development of diverse ecosystems. The analysis of chlorophyll a (Chl a), as an indicator of primary production in these regions, is crucial for the quantification of phytoplankton biomass, which is considered the main food chain base in the oceans and an indicator of the trophic state index. This variable is greatly important for the analysis of the oceanographic variability, and it is crucial for determining the tendencies of change in these areas with the objective of determining the effects on the ecosystem and the population dynamics of marine resources. In this study, we analysed the Chl a concentration distribution on the mainland coast of the Gulf of California based on the monthly data from July 2002 to July 2019, obtained from remote sensing (Moderate-Resolution Imaging Spectroradiometer Aqua (MODIS-Aqua) with a 9 km resolution). The results showed a clear distribution pattern of Chl a observed along this area with the maximum levels in March and minimum levels in August. A four-region characterisation on this area was used to make a comparison of the Chl a concentrations during warm and cold periods. The majority of the results were statistically significant. The spectral analysis in each of the four regions analysed in this study determined the following variation frequencies: annual, semi-annual, seasonal, and inter-annual; the last was related to the macroscale climatological phenomena El Niño-La Niña affecting the variability of the Chl a concentration in the study region.

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Bryde’s whale (Balaenoptera edeni) in the southwestern Gulf of California: Relationship with ENSO variability and prey availability

Cited by 30 publications

References 21 publications

Local abundance, apparent survival and site fidelity of Bryde’s whales in the Hauraki Gulf (New Zealand) inferred from long-term photo-identification

Local abundance, apparent survival and site fidelity of Bryde’s whales in the Hauraki Gulf (New Zealand) inferred from long-term photo-identification

The Effect of Climate Variability on Gray Whales (Eschrichtius robustus) within Their Wintering Areas

Chlorophyll a Concentration Distribution on the Mainland Coast of the Gulf of California, Mexico

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