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Examines in Marine Biology & Oceanography

Presence of Pinnipeds From South America in The Mexican Pacific, A Consequence of Climate Change

Nereyda Pablo Rodríguez*

Associate researcher of anthropological research and solutions network, Mexico

*Corresponding author: Nereyda Pablo Rodríguez, Associate researcher of anthropological research and solutions network, Mexico

Submission: April 14, 2020;Published: April 27, 2020

DOI: 10.31031/EIMBO.2021.04.000577

ISSN 2578-031X
Volume4 Issue1

Abstract

Environmental changes caused by climate change have affected the distribution and feeding behavior of different species, including marine mammals such as pinnipeds, as an example there were reports of pinniped sightings on Mexican beaches, the original distribution and feeding areas are on the coasts of South America. These reports are becoming more and more frequent, and their possible causes are related with climatic anomalies such as El Niño-Southern Oscillation or La Niña event and the distribution of their potential prey.

Keywords: Climate change; Pinnipeds; Mexico

Introduction

The United Nations Framework Convention on Climate Change (UNFCCC), in its article 1, defines climate change as “climate change attributed directly or indirectly to human activity that alters the composition of the global atmosphere and that adds to the natural variability of the climate observed during comparable periods of time”. Thus, the UNFCCC differentiates between climate change attributable to human activities that alter atmospheric composition and climate change attributable to natural causes [1]. The evolutionary record from previous climate perturbations indicates that marine mammals are highly vulnerable but also remarkably adaptable to Climatic Change (CC) in coastal ecosystems [2]. Pinnipeds are unique marine mammals because they spend much of their life at the sea, but they require land or ice to give birth. Consequently, one of the effect of the CC impact their distribution and abundance through direct pathways, such as loss or gain of terrestrial [2].
Studies have been conducted focused on the conservation of pinnipeds, and how CC affects them [3]. In Mid-latitude species such as Galapagos fur seal (Arctocephalus galapagoensis) or Guadalupe fur seal (Arctocephalus philippii townsendi) are affected by warm oceanographic anomalies, like North Pacific marine heatwave termed “The Blob” or the 2015-2016 El Niño- Southern Oscillation (ENSO) [4,5]. These warm water anomalies impact primary productivity, and hence prey availability across the trophic web, including for pinnipeds and other top predators [6,3,7], many times declining their populations [8-10].
Another documented effect is the change in distribution sites, as the northward shift in longterm distribution of the northern elephant seal (Mirounga angustirostris) from Mexico this has been explained as a probable consequence of the ocean warming [11,12]. CC has become a major concern, since the increment of the sea surface temperature result in a nutritional stress [13], and a disruption of the northern elephant seal’s ability to thermoregulate while on land [14]. In the case of the Southern Elephant Seal (SES; Mirounga leonina), effects of global CC are not well known, although there may be an impact on foraging areas. Over the last decades ocean warming and the reduction of ice extents in certain areas of Antarctica [15]; affect life cycle, distribution, and abundance of key species like krill (Euphausia superba), important for the food web of the Southern Ocean ecosystem [16,17].
Pinniped species with distribution in South America have been observed more frequently in waters of the Mexican Pacific, as for the Glapagos fur Seal, reported in 2016 on the beaches of Michoacán, Páez et al. [18] hypothesized that the presence of the species could be related to anomalous temperatures recorded in the Pacific Ocean during the ENSO (2015-2016). This cause presence of tropical pinnipeds outside of their potential foraging or reproductive áreas are primarily associated with oceanographic anomalies like ENSO [19,20]. Previously, Aurioles Gamboa et al. [21] reported two juveniles of Galapagos fur seal on the beaches of Chiapas and Guerrero during 1998, which coincides with a very intense ENSO 1997-1998.
During 2013, Zurita et al. [22] reported a sighting of Arctocephalus australis on the beaches of Oaxaca in Mexico, this species inhabits the continental margins of the Pacific and Atlantic coasts of South America, from southern Brazil to the Paracas peninsula of southern Peru [23]. The presence of this species in the Mexican Tropical Pacific could be related to an anomalous sea surface temperature during that period, which were related to La Niña conditions (cold temperatures) that are opposite of those observed for El Niño (warm phase). Zurita et al. [22] hypothesized that these anomalous cold conditions in 2013 allowed an unusual dispersion by this fur seal toward Mexican coasts. On the other hand, during the last two years, Mexican organizations have reported SES on Mexican beaches. The species presents virtually circumpolar distribution in the South. The reported have been in different beaches of Oaxaca, Chiapas, Baja California Sur and Nayarit in Mexico, which seem to be from the same individual, but the case is rare in the area. However, for this species it has already been reported in areas of Brazil, Ecuador and Central America [24- 28].
According to Verplancken et al. [29], the diet could be a possible factor that has altered dispersal patterns of SES or other species. Additionally, other long-term phenomena have been recorded regarding ocean warming and the global shaolin of hypoxic oxygen minimum zones and their relationships with the range expansion of the jumbo squid (Dosidicus gigas) from the Humboldt Curren Ecosystem into the northeastern Pacific [30,31]. It must consider that the described species have a behaviour of moving to remote feeding places. Therefore, there is no doubt that we will continue seeing more frequent records of southern pinniped species moving to the northern areas of their distribution, which could be related to changes in the environment and the presence of potential prey.

References

  1. (2018) In: Matthews JBR (Ed.), Calentamiento global de 1.5 °C, Informe especial del IPCC sobre los impactos del calentamiento global de 1.5 ºC con respecto a los niveles preindustriales y las trayectorias correspondientes que deberían seguir las emisiones mundiales de gases de efecto invernadero, en el contexto del reforzamiento de la respuesta mundial a la amenaza del cambio climático, el desarrollo sostenible y los esfuerzos por erradicar la pobreza. Mexico.
  2. Allen S, Brown E, Faulkner K, Gende S, Womble J (2011) Conserving pinnipeds in Pacific Ocean parks in response to climate change. Park Science 2: 48-52.
  3. Kovacs KM, Aguilar A, Aurioles GD (2012) Global threats to pinnipeds. Mar Mamm Sci 28(2):414-436.
  4. Bond NA, Cronin MF, Freeland H (2015) Causes and impacts of the 2014 warm anomaly in the NE Pacific. Geophys Res Lett 42(9): 3414-3420.
  5. NOAA Fisheries (2019) Guadalupe fur seal unusual mortality event in California. USA.
  6. Trillmich F, Ono KA (1991) Pinnipeds and El Niño: Responses to environmental stress. Springer, Germany.
  7. Amador CMJ, Moreno SXG, Ventura PD, Juárez A, González E, et al. (2020) Ecological implications of unprecedented warm water anomalies on interannual prey preferences and foraging areas of Guadalupe fur seals. Mar Mamm Sci 36(4): 1254-1270.
  8. Alva JJ, Salazar S (2006) Status and conservation of otariids in Ecuador and the Galapagos Islands. In: Trites AW, et al. (Eds.), Sea lions of the worls. pp. 495-520.
  9. Trillmich F (2015) Arctocephalus galapagoensis. International Union for Conservation of Nature. Mexico.
  10. Trillmich F, Meise K, Kalberer S, Mueller B, Piedrahita P, et al. (2016) On the challenge of interpreting census data: Insights from a study of an endangered pinniped. PLoS One 11(5): e0154588.
  11. García MC, Turrent C, Elorriaga FR, Alejandro A, Yolanda S (2018) Climate change and the northern elephant seal (Mirounga angustirostris) population in Baja California, Mexico. PLoS One 13(2): e193211.
  12. García A (2021) Northern elephant seal (Mirounga angustirostris, Gill 1866). In: Heckel G & Schramm Y (Eds.), Ecology and conservation of pinnipeds in Latin America. pp. 191-208.
  13. Boeuf BJ, Crocker DE (2005) Ocean climate and seal condition. BMC Biol 3: 9.
  14. Noren DP (2002) Thermoregulation of weaned northern elephant seal (Mirounga angustirostris) pups in air and water. Physiol Biochem Zool 75(5): 513-523.
  15. Stammerjohn SE, Martinson DG, Smith RC (2008) Trends in Antarctic annual sea ice retreat and advance and their relation to El Niño-Southern oscillation and Southern annular mode variability. J Geophys Res 113(C3): 1-20.
  16. Flores H, Atkinson A, Kawaguchi S (2012) Impact of climate change on Antarctic krill. Mar Ecol Prog Ser 458: 1-19.
  17. Hindell MA, Sumner M, Bestley S (2017) Decadal changes in habitat characteristics influence population trajectories of southern elephant seals. Glob Chang Biol 23(12): 5136-5150.
  18. Rosas D, Valdovinos L, Verplancken FR (2017) Northernmost record of the Galápagos fur seal (Arctocephalus galapagoensis): A consequence of anomalous warm conditions around the Galápagos Archipelago. Aquatic Mammals 43(6): 627-632.
  19. Capella JJ, González L, Fernández P, Palacios DM (2002) Regular appearance of otariid pinnipeds along the Colombian Pacific coast. Aquatic Mammals 28(1): 67-72.
  20. Elorriaga FR, Rodríguez GE, Rosales NH, Acevedo K, Sandoval J (2016) Impact of the 2015 El Niño-Southern oscillation on the abundance and foraging habits of Guadalupe fur seals and California sea lions from the san benito archipelago, Mexico. PLoS One 11(5): e0155034.
  21. Aurioles D, Schramm Y, Mesnick S (2004) Galapagos fur seals, Arctocephalus galapagoensis, in Mexico. Latin American Journal of Aquatic Mammals 3(1): 77-80.
  22. Villegas F, Elorriaga FR (2016) First report of a South American fur seal (Arctocephalus australis) in Mexico. Aquatic Mammals 42(1): 42-46.
  23. Ferreira R (1982) Arctocephalus australis Zimmermann, South American fur seal. Small cetaceans, seals, sirenians, and otters. FAO Fisheries Series 5: 497-508.
  24. Siciliano S, Lodi L (1989) Pinnipeds observed along the coast of Rio de Janeiro state, Brazil, 1987-1989. In Abstracts: The eighth biennial conference on the biology of marine mammals. pp. 7-11.
  25. Moura JF, Dario BPS, Lima LM, Siciliano S (2010) Southern elephant seals (Mirounga leonina) along the Brazilian coast: Review and additional records. Marine Biodiversity Records 3.
  26. Alva JJ, Aurioles GD (2017) Introduction to tropical and subtropical pinnipeds. In: Alava JJ (Ed), Tropical pinnipeds: Bio-ecology, threats and conservation pp. 1-11.
  27. Rosas D, Zarate P, Lazo M, Magaña F (2018) Feeding behavior and trophic interaction of three shark species in the Galapagos. Marine Reserve Peer J 6: e4818.
  28. Redwood SD, Felix F (2018) Note the most northerly record of a southern elephant seal (Mirounga leonina) in the Pacific Ocean at the Island of Taboga, Gulf of Panama, Panama. Aquatic Mammals 44(1): 13-18.
  29. Verplancken FR, Blanco A, Silva CA, Mendoza A, Nanduca H, et al. (2020) A Southern elephant seal (Mirounga leonina) in the Gulf of California: Genetic confirmation of the northernmost record to date. Aquatic Mammals 46(2): 137-145.
  30. Field JC, Baltz KEN, Phillips AJ, Walker WA (2007) Range expansion and trophic interactions of the jumbo squid, Dosidicus gigas, in the California Current. California Cooperative Oceanic Fisheries Investigations Report 48: 131.
  31. Stewart JS, Hazen EL, Bograd SJ, Byrnes JE, Foley DG, et al. (2014) Combined climate‐and prey‐mediated range expansion of Humboldt squid (Dosidicus gigas), a large marine predator in the California current system. Global change biology 20(6): 1832-1843.

© 2021 Nereyda Pablo Rodríguez. This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and build upon your work non-commercially.