Carla Patulny

AGIR à dom

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Joëlle De Weerdt

AGIR à dom

Phillip J. Clapham

Vashon Partners (United States)

John Calambokidis

Cascadia Research Collective

Leslie Blanchet

AGIR à dom

Marc Kochzius

Vrije Universiteit Brussel

Victoria Pouey‐Santalou

Universidad Autónoma de Guerrero

Etienne Pouplard

AGIR à dom

Nerea Ruiz Pérez

Vrije Universiteit Brussel

Bram Vanschoenwinkel

Vrije Universiteit Brussel

Cooperative Institutions

AGIR à dom

Vrije Universiteit Brussel

NOAA National Marine Fisheries Service Alaska Fisheries Science Center

NOAA National Marine Fisheries Service

National Oceanic and Atmospheric Administration

Cascadia Research Collective

Washington State University Vancouver

Washington University in St. Louis

Stanford University

Bielefeld University

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Sightings of Bryde's whale, Balaenoptera edeni, off the Pacific coast of Nicaragua

Journal of the Marine Biological Association of the United Kingdom (2024)

Joëlle De Weerdt Carla Patulny Nerea Ruiz Pérez Leslie Blanchet

Abstract Here, we report the first sighting records of Bryde's whales in Nicaragua. Four sightings were made in 2022 during boat-based surveys off the southwestern coast of Nicaragua. Photo-identification, distributional data, dive times, and behavioural information were collected, and environmental parameters, including sea surface temperature, were measured for each sighting. Sightings included calf and non-calf groups displaying travelling ( n = 1; 25%), milling ( n = 1; 25%), and suspected feeding ( n = 2; 50%) behaviours. Approximately 4 h of focal following allowed the calculation of short and long breath intervals. Based on our observations, the individuals were suspected of feeding in the area, based on the presence of feeding birds, feeding humpback whales, relatively high time-lagged chlorophyll-a, and observed general behaviours. Our findings indicate that this species may occasionally visit Nicaraguan coastal areas in search of feeding opportunities, and could represent a possible range extension of the Eastern North Pacific stock.

Minke whale

10.1017/s0025315424000250

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The yellow-bellied sea snake, Hydrophis platurus (Squamata: Elapidae), off the Southwestern Pacific coast of Nicaragua, Central America

Revista de Biología Tropical (2021)

Joëlle De Weerdt Carla Patulny Phillip J. Clapham

Introduction: The yellow-bellied sea snake (Hydrophis platurus, formerly Pelamis platurus) is known to occur along the Pacific coast of Central America. However, there are no marine records of this species off the coast of Nicaragua. Objective: Report the first in situ marine observations of the yellow-bellied sea snake observed on three occasions in 2020 during cetacean surveys off the southwestern Pacific coast of Nicaragua. Methods: During the sightings, photographs were taken which allowed the identification of the species based on morphology. Sea surface temperature, sea state, and distance to the coast are presented as descriptors of the habitat of the records. Results: Three field observations of yellow-bellied sea snakes were recorded on separate occasions. Sightings occurred within 30 km of each other and 3.3 km from the coast. Average sea surface temperature was 26.6 °C with low swell and sea state. Conclusions: The present information offers new knowledge about the presence of the yellow-bellied sea snake on the Pacific coast of Central America, contributing to the biodiversity record in Nicaragua.

Elapidae

10.15517/rbt.v69isuppl.2.48324

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Abundance, distribution and behaviour of humpback whales (

Marine and Freshwater Research (2022)

Joëlle De Weerdt John Calambokidis Etienne Pouplard Victoria Pouey‐Santalou Carla Patulny

Context Previous research has shown the presence of an endangered humpback whale population breeding off the Pacific coast of Central America. However, little is known about the density, size, social-group structure and spatial habitat use of this subpopulation. Aim The study goal was to characterise a potential breeding subpopulation of humpback whales in the waters off Nicaragua. Five objectives were used to achieve this goal: (1) estimate abundance, (2) determine encounter rates, (3) define group composition, (4) assess distribution, and (5) document habitat-use patterns. Method Boat-based surveys were conducted between November and April at two study sites along the Pacific coast of Nicaragua in the winters of 2004–2008 and 2016–2020. Key result Inter-annual mark–recapture estimates did not yield a reliable estimate of abundance. Encounter rates were lower for the northern study site than for the southern site. Group composition consisted of groups with calves, singers and competitive males. Conclusion These results confirmed that Nicaragua is a breeding area based on known breeding-ground behaviours observed in other areas, and similar environmental characteristics. Implication Distinct habitats were found at the two study sites, suggesting that Central American humpback whales might use different areas within the broader Central American breeding range according to their needs and activity.

Humpback whale

10.1071/mf21326

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