Evaluating the drivers of Indo‐Pacific biodiversity: speciation and dispersal of sea snakes (Elapidae: Hydrophiinae)

Ukuwela, Kanishka D. B.; Lee, Michael S. Y.; Rasmussen, Arne Redsted; Silva, Anslem de; Mumpuni, _; Fry, Bryan G.; Ghezellou, Parviz; Rezaie-Atagholipour, Mohsen; Sanders, Kate L.

doi:10.1111/jbi.12636

Cited by 22 publications

(29 citation statements)

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“…In this paper we describe the biogeographic origins of IO sea snakes and the effects of the past and present barriers to dispersal and gene flow between the IO and WP through reinterpretation of our data on the biogeographic origins of IAA sea snakes (Ukuwela et al, 2016) and the effects of the past and present barriers to dispersal and gene flow in the IAA (Ukuwela et al, 2014). For the inclusiveness, we have summarised the methods employed in Ukuwela et al (2014 and2016) here and the readers are requested to refer the original papers if further details are necessary.…”

Section: Methodsmentioning

confidence: 99%

“…For the inclusiveness, we have summarised the methods employed in Ukuwela et al (2014 and2016) here and the readers are requested to refer the original papers if further details are necessary.…”

Section: Methodsmentioning

confidence: 99%

“…The total dataset included 320 individuals of which 233 (36 species) were collected as fisheries by-catch during field surveys, 57 were from specimens accessioned in museums (22 species) and sequence data for 30 (16 species) were downloaded from the Genbank. Specimen collection localities, museum/ voucher numbers, details of DNA extraction, primers and PCR cycle settings are available in Ukuwela et al, (2016). Phylogenies were inferred using maximum likelihood and Bayesian analyses of the concatenated mitochondrial and nuclear alignment.…”

Section: Phylogeny Reconstruction and Divergence Datingmentioning

confidence: 99%

“…Bayesian analyses with estimation of the divergence times were performed in MrBayes 3.2 (Ronquist et al, 2012). Details on outgroup selection, node calibration and selection of clocks are available in Ukuwela et al, (2016).…”

Section: Phylogeny Reconstruction and Divergence Datingmentioning

confidence: 99%

“…The most appropriate of the above sets of models was selected using Bayes Factors. For further details of the analyses, see the materials and methods in Ukuwela et al (2016).…”

Section: Ancestral Area Reconstructionmentioning

confidence: 99%

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Biogeographic origins of the viviparous sea snake assemblage (Elapidae) of the Indian Ocean

et al. 2017

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Abstract:One of the primary goals in biogeography is to understand how different biotas have been assembled in different regions of the world. The presence of the viviparous sea snakes in the Indian Ocean (IO) poses a unique question in this regard due to their evolutionary origins in Australasia (Australia and New Guinea). Here, we examined the origins and patterns of colonization of the IO sea snake assemblage through time-calibrated molecular phylogenies and ancestral area reconstructions. We further evaluated how past and present barriers to dispersal affect genetic diversity of IO sea snakes by examining the population genetic structure of the widespread sea snake, Hydrophis curtus. Our phylogenetic analyses and ancestral area reconstructions strongly indicate that the majority of the IO sea snakes are derived from the Southeast Asian (SEA) sea snake fauna through dispersal and colonization with an in situ radiation (Hydrophis stricticollis-Hydrophis obscurus clade). Further, many species have undergone vicariant speciation events across the Sunda shelf/Indo-Pacific barrier, which formed during the low sea level periods of the Pleistocene. Population genetic analysis of H. curtus revealed a prominent genetic break between populations broadly distributed in the IO and SEA with limited recent gene flow indicating possible cryptic species. These results suggest that compared to the viviparous sea snake stem group that originated 10.6-6.5 million years ago, the IO viviparous sea snakes have a relatively long and complex evolutionary history in the IO and thus have a unique conservation value.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Phylogeny Reconstruction and Divergence Datingmentioning

confidence: 99%

Section: Phylogeny Reconstruction and Divergence Datingmentioning

confidence: 99%

“…The most appropriate of the above sets of models was selected using Bayes Factors. For further details of the analyses, see the materials and methods in Ukuwela et al (2016).…”

Section: Ancestral Area Reconstructionmentioning

confidence: 99%

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Biogeographic origins of the viviparous sea snake assemblage (Elapidae) of the Indian Ocean

et al. 2017

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Fisheries induced shift in sea snake community assemblages along the Konkan coast, India

Rao¹,

Dsouza²,

Gupta³

et al. 2021

Aquatic Conservation

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The impacts of fisheries on several charismatic marine fauna have been a subject of global concern. Sea snakes share the same habitats as many commercially important fish species and often end up as fisheries bycatch. Previous studies of bycatch from India have been limited to individual reports of mortality, with little information on the regional community structure of sea snakes. This study was carried out along the Konkan coast, off the central west coast of India, between 2016 and 2018, to determine trends in the bycatch of sea snakes in coastal fisheries. In this study, 922 sea snakes were encountered in 916.57 gillnet haul hours and 449.16 trawlers haul hours of fishing, comprising largely of two species: beaked sea snake (Hydrophis schistosus) and spine‐bellied sea snake (Hydrophis curtus) (83.05 and 16.94% respectively) which was in stark contrast to a similar study conducted in 2002–03, which recorded a dominance of H. curtus (84%) followed by H. schistosus (14%) in the same region. Both studies, however, indicated higher mortality in H. curtus than in H. schistosus in trawl nets. This study highlights the significant impact of non‐selective fishing practices on regional assemblages of other marine organisms such as sea snakes from South Asia, which has been relatively understudied, and the potential consequences for local ecosystems.

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Diversification and distribution of gall crabs (Brachyura: Cryptochiridae: Opecarcinus) associated with Agariciidae corals

Bravo

Paulay

et al. 2021

Coral Reefs

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Coral reefs are home to the greatest diversity of marine life, and many species on reefs live in symbiotic associations. Studying the historical biogeography of symbiotic species is key to unravelling (potential) coevolutionary processes and explaining species richness patterns. Coral-dwelling gall crabs (Cryptochiridae) live in obligate symbiosis with a scleractinian host, and are ideally suited to study the evolutionary history between heterogeneous taxa involved in a symbiotic relationship. The genus Opecarcinus Kropp and Manning, 1987, like its host coral family Agariciidae, occurs in both Indo-Pacific and Caribbean seas, and is the only cryptochirid genus with a circumtropical distribution. Here, we use mitochondrial and nuclear DNA gene fragments of Opecarcinus specimens sampled from 21 Indo-Pacific localities and one Atlantic (Caribbean) locality. We applied several species delimitation tests to characterise species diversity, inferred a Bayesian molecular-clock time-calibrated phylogeny to estimate divergence times and performed an ancestral area reconstruction. Time to the most recent common ancestor (tMRCA) of Opecarcinus is estimated at 15−6 Mya (middle Miocene—late Miocene). The genus harbours ~ 15 undescribed species as well as several potential species complexes. There are indications of strict host-specificity patterns in certain Opecarcinus species in the Indo-Pacific and Atlantic, however, a robust phylogeny reconstruction of Agariciidae corals—needed to test this further—is currently lacking. The Indo-West Pacific was inferred to be the most probable ancestral area, from where the Opecarcinus lineage colonised the Western Atlantic and subsequently speciated into O. hypostegus. Opecarcinus likely invaded from the Indo-West Pacific across the East Pacific Barrier to the Atlantic, before the full closure of the Isthmus of Panama. The subsequent speciation of O. hypostegus, is possibly associated with newly available niches in the Caribbean, in combination with genetic isolation following the closure of the Panama Isthmus.

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Evaluating the drivers of Indo‐Pacific biodiversity: speciation and dispersal of sea snakes (Elapidae: Hydrophiinae)

Cited by 22 publications

References 74 publications

Biogeographic origins of the viviparous sea snake assemblage (Elapidae) of the Indian Ocean

Biogeographic origins of the viviparous sea snake assemblage (Elapidae) of the Indian Ocean

Fisheries induced shift in sea snake community assemblages along the Konkan coast, India

Diversification and distribution of gall crabs (Brachyura: Cryptochiridae: Opecarcinus) associated with Agariciidae corals

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