Early Mode of Life and Hatchling Size in Cephalopod Molluscs: Influence on the Species Distributional Ranges

Villanueva, Roger; Vidal, Erica A. G.; Fernández-Álvarez, Fernando Ángel; Nabhitabhata, Jaruwat

doi:10.1371/journal.pone.0165334

Cited by 80 publications

(71 citation statements)

References 123 publications

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“…It is usually inversely related to fecundity (see Vance, 1973a,b) as well as to offspring survival and hence population dynamics. Cephalopods with smaller hatchlings (and thus smaller eggs) have broader latitudinal distribution ranges (Villanueva et al, 2016). The reproductive strategies of most marine invertebrate taxa cover an adaptive range from relatively highly fecund species with small eggs to relatively low-fecundity species with large eggs.…”

Section: Evolutionary History Of Cephalopod Reproductive Strategimentioning

confidence: 99%

Cephalopod embryonic shells as a tool to reconstruct reproductive strategies in extinct taxa

2017

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An exhaustive study of existing data on the relationship between egg size and maximum size of embryonic shells in 42 species of extant cephalopods demonstrated that these values are approximately equal regardless of taxonomy and shell morphology. Egg size is also approximately equal to mantle length of hatchlings in 45 cephalopod species with rudimentary shells. Paired data on the size of the initial chamber versus embryonic shell in 235 species of Ammonoidea, 46 Bactritida, 13 Nautilida, 22 Orthocerida, 8 Tarphycerida, 4 Oncocerida, 1 Belemnoidea, 4 Sepiida and 1 Spirulida demonstrated that, although there is a positive relationship between these parameters in some taxa, initial chamber size cannot be used to predict egg size in extinct cephalopods; the size of the embryonic shell may be more appropriate for this task. The evolution of reproductive strategies in cephalopods in the geological past was marked by an increasing significance of small-egged taxa, as is also seen in simultaneously evolving fish taxa.

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Section: Evolutionary History Of Cephalopod Reproductive Strategimentioning

confidence: 99%

Cephalopod embryonic shells as a tool to reconstruct reproductive strategies in extinct taxa

2017

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“…In the eastern Pacific, the reported oceanic cephalopods (>100 species) constitute about 12% of the world's species (Nesis, ), which primarily inhabit the first 1,000 m depth and undergo daily vertical migrations (Boyle & Rodhouse, ; Young & Hirota, ). The oceanic cephalopods inhabiting Pacific waters have wide geographical distributions (>5,000 km) and very low endemism (Ibáñez et al., ), mainly due to their high dispersal capabilities during both early (paralarvae and juvenile) and adult stages (Boyle & Rodhouse, ; Villanueva, Vidal, Fernández‐Álvarez, & Nabhitabhata, ). Those characteristics (wide distribution, high dispersal and low endemism) make cephalopods a good model to test biogeographic hypotheses in the Pacific Ocean.…”

Section: Introductionmentioning

confidence: 99%

Zoogeographic patterns of pelagic oceanic cephalopods along the eastern Pacific Ocean

Ibáñez

Braid

Carrasco

et al. 2019

Journal of Biogeography

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Aim To analyse the diversity and distribution of oceanic pelagic cephalopods along the eastern Pacific Ocean assessing the existence of biogeographic structuring, and the role of physical variables in generating geographical patterns. We hypothesized that the control by environmental factors, and the effect of geometric constraints, determine the range size and limits of distribution of oceanic cephalopods along the eastern Pacific Ocean, generating a latitudinal gradient in species richness. Location Eastern Pacific Ocean (60°N – 60°S), from the Gulf of Alaska to the Southern Ocean. Methods Based on a literature review and >5,000 records obtained from collections, we constructed a presence–absence matrix including 61 latitudinal bands (2° each) along the Eastern Pacific, and estimated species richness and range endpoints at each band. Biogeographic units were determined by means of multivariate analyses. Species richness was compared with null model predictions in order to test for the existence of geometric constraints using the Mid‐Domain Null model. The effects on species richness of environmental variables (temperature, salinity and oxygen) were evaluated separately for surface and depth (0–1,000 m) data, by means of ordinary least squares regression and simultaneous autoregressive models. Rapoport's pattern was assessed by applying the Stevens’ method and the range midpoint method. Results Species richness was high across the tropics and decreased towards the both poles. We identified five biogeographic units, highlighting two major distribution breaks at 40°N and 42°S. Species richness was strongly related with environmental variables, although the combined variables accounted for a large fraction of the variance between 0 and 1,000 m (R2 = 0.99), while temperature was the best single predictor at the surface (R2 = 0.98). Species richness curves showed a mid‐domain effect (MDE), and the mean latitudinal range was higher in the tropics and at warm latitudes, generating an inverse Rapoport's pattern. Main conclusions Along the eastern Pacific Ocean oceanic cephalopods exhibit both a clear biogeographic patterning and an interhemispheric (poleward decreasing) diversity gradient, which appear strongly related with physical factors and external forcing, as well as with a MDE as a seemingly consequence of the naturally bounded domain of the Eastern Pacific.

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“…This is reflected in the three distinct host networks detected in the Philippines (Figure 2) and suggests that geography may be influencing host genetic exchange and distribution. This could be because the benthic lifestyle adult Euprymna squid (~2–4 cm) lead as adults rarely migrate; however, the semipelagic nature of newly hatched squid (~3–5 mm) would allow water flow to transport juveniles to novel locations (Kimbell et al., 2002; Villanueva, Vidal, Fernández‐Álvarez & Nabhitabhata, 2016). Two of the distinct networks occur in the central island chain and, while having similar geologic origin, show no genetic connection in habitats that are homogeneous (Allen & Werner, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…The disparity in these patterns may be a result of differences in dispersal methodology between mutualist partners; that is, host squid have a limited range as adults and rarely travel far from their birthplace due to the limited dispersal ability of direct developing, benthic hatchlings (Kimbell et al., 2002; Villanueva et al., 2016). Conversely, symbiotically viable Vibrio bacteria are cycled out of the host daily exposing them to environmental factors (i.e., currents) that allow for movement into novel areas where they are able to recruit into a new host.…”

Section: Discussionmentioning

confidence: 99%

Phylogeographic patterns in the Philippine archipelago influence symbiont diversity in the bobtail squid–Vibrio mutualism

Coryell

Turnham

Ayson

et al. 2018

Ecology and Evolution

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Marine microbes encounter a myriad of biotic and abiotic factors that can impact fitness by limiting their range and capacity to move between habitats. This is especially true for environmentally transmitted bacteria that cycle between their hosts and the surrounding habitat. As geologic history, biogeography, and other factors such as water temperature, salinity, and physical barriers can inhibit bacterial movement to novel environments, we chose to examine the genetic architecture of Euprymna albatrossae (Mollusca: Cephalopoda) and their Vibrio fischeri symbionts in the Philippine archipelago using a combined phylogeographic approach. Eleven separate sites in the Philippine islands were examined using haplotype estimates that were examined via nested clade analysis to determine the relationship between E. albatrossae and V. fischeri populations and their geographic location. Identical analyses of molecular variance (AMOVA) were used to estimate variation within and between populations for host and symbiont genetic data. Host animals demonstrated a significant amount of variation within island groups, while symbiont variation was found within individual populations. Nested clade phylogenetic analysis revealed that hosts and symbionts may have colonized this area at different times, with a sudden change in habitat. Additionally, host data indicate restricted gene flow, whereas symbionts show range expansion, followed by periodic restriction to genetic flow. These differences between host and symbiont networks indicate that factors “outside the squid” influence distribution of Philippine V. fischeri. Our results shed light on how geography and changing environmental factors can impact marine symbiotic associations at both local and global scales.

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Early Mode of Life and Hatchling Size in Cephalopod Molluscs: Influence on the Species Distributional Ranges

Cited by 80 publications

References 123 publications

Cephalopod embryonic shells as a tool to reconstruct reproductive strategies in extinct taxa

Cephalopod embryonic shells as a tool to reconstruct reproductive strategies in extinct taxa

Zoogeographic patterns of pelagic oceanic cephalopods along the eastern Pacific Ocean

Phylogeographic patterns in the Philippine archipelago influence symbiont diversity in the bobtail squid–Vibrio mutualism

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