Effects of temperature on embryonic development and paralarval behavior of the neon flying squid Ommastrephes bartramii

Vijai, Dharmamony; Sakai, Mitsuo; Wakabayashi, T.; Yoo, Hae-Kyun; Kato, Yoshiki; Sakurai, Yasunori

doi:10.3354/meps11286

Cited by 16 publications

(18 citation statements)

References 43 publications

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“…Although cephalopods’ sensitivity to external environmental factors (e.g. salinity and temperature) is well known (Otero, Rocha, Gonzalez, Gracia, & Guerra, ; Pierce & Boyle, ; Takahara, Kidokoro, & Sakurai, ; Vijai et al., ), their distributions have not shown a correlation with environmental productivity (Keller, Valls, Hidalgo, & Quetglas, ). In fact, oceanic zones in the Southeast Pacific around the subtropical gyre, where a high cephalopod diversity is found, are recognized as oligotrophic environments with very low chlorophyll‐ a (Chl‐ a ) concentrations (Andrade, Hormazábal, & Correa‐Ramírez, ; Longhurst, ; von Dassow & Collado‐Fabri, ) and low phytoplankton productivity (<100–250 gCm −2 year −1 ; Kaiser et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…Although cephalopods' sensitivity to external environmental factors (e.g. salinity and temperature) is well known (Otero, Rocha, Gonzalez, Gracia, & Guerra, 2005;Pierce & Boyle, 2003;Takahara, Kidokoro, & Sakurai, 2017;Vijai et al, 2015), their distributions have not shown a correlation with environmental productivity (Keller, Valls, Hidalgo, & Quetglas, 2014…”

Section: Species Richnessmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

Section: Species Richnessmentioning

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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“…8). Soon after hatching, paralarvae demonstrated a hop and sink swimming behavior within the egg mass, which is common in ommastrephid paralarvae (Vijai et al, 2015b). Paralarvae spent approximately 2 h within the egg mass before swimming out vertically.…”

Section: Paralarvaementioning

confidence: 97%

“…They ascended slowly from the mid-water in the tank until they reached the surface, where they swam in circular or random patterns. In the surface waters, they demonstrated a wide variety of behavior, including the ball posture (withdrawing the head inside mantle) typical of ommastrephid paralarvae (Vijai et al, 2015b). They developed beyond stage 34 ( Fig.…”

Section: Paralarvaementioning

confidence: 99%

Observations on the spawning behavior, egg masses and paralarval development of the ommastrephid squid Todarodes pacificus in a laboratory mesocosm

Puneeta

Vijai

Yoo

et al. 2015

Journal of Experimental Biology

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The spawning behavior of ommastrephid squids has never been observed under natural conditions. Previous laboratory observations of Japanese flying squid (Todarodes pacificus) suggest that prespawning females might rest on the continental shelf or slope before they ascend above the pycnocline to spawn, and that the egg masses might settle in the pycnocline. Here, two mesocosm experiments were conducted in a 300 m 3 tank that was 6 m deep to investigate this hypothesis. In the first experiment, a thermocline (2.5-3.5 m) was established in the tank by creating a thermally stratified (17-22°C) water column. In the second experiment, the temperature was uniform (22°C) at all depths. Prior to spawning, females did not rest on the tank floor. In the stratified water column, egg masses remained suspended in the thermocline, but in an unstratified water column, they settled on the tank bottom, collapsed and were infested by microbes, resulting in abnormal or nonviable embryos. Eleven females spawned a total of 18 egg masses (17-80 cm in diameter), indicating that females can spawn more than once when under stress. Paralarvae hatched at stage 30/31 and survived for up to 10 days, allowing us to observe the most advanced stage of paralarvae in captivity. Paralarvae survived after consumption of the inner yolk, suggesting they might have fed in the tank.

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“…This spawning strategy has many advantages (e.g., reducing predation 101 pressure and allowing for wider dispersion) (Vijai et al 2014, Vijai et al 2015 and minimal predator density. In natural squid spawning areas, males and females coexist (Tafur 110 et al 2001).…”

mentioning

confidence: 99%

Male copulatory behavior interrupts Japanese flying squid Todarodes pacificus female spawning activity

Puneeta¹,

Vijai²,

Yamamoto³

et al. 2016

Mar. Ecol. Prog. Ser.

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14Batch spawning, intermittent spawning and multiple spawning represent common 15 reproductive strategies among cephalopods. These flexible spawning strategies are also common 16 in fishes, and are thought to be a female trait that is programmed depending on environmental 17 parameters. The ommastrephid squid Todarodes pacificus, being a terminal spawner, is 18 considered to have a single spawning event, extruding one large egg mass and dying soon 19 thereafter. Females that are interrupted by males exhibiting mating behavior, while extruding the 20 egg mass, instead spawn multiple egg masses over the course of 2-3 days instead of dying soon 21 after spawning the first egg mass. We demonstrate that male mating behavior causes "forced" 22 intermittent spawning by females (i.e., more than one spawning event). We hypothesize that in T. 23 pacificus, some males use this strategy to mate with females unable to repel advances while 24 spawning, and thus providing the male with the opportunity to contribute sperm and enhance 25 gene flow. 26Keywords: batch spawning, spawning interruption, multiple paternity, egg mass, oceanic squid 27 INTRODUCTION 28Coleoid cephalopods are considered semelparous (i.e., no gonadal resting phase) 29 (Mangold 1987), with the exception of the recently reported iteroparous vampire squid (Hoving 30 et al. 2015). Although the spawning pattern of cephalopods is monocyclic (single spawning 31 season), semelparity occurs in species that spawn eggs in single or multiple events, with their 32 reproductive strategies being considered very flexible (Pecl 2001). The terms "batch spawning," 33 "intermittent spawning," and "multiple spawning" are common in studies of cephalopod 34 reproductive biology, particularly among species of the family Ommastrephidae, with these 35 3 terms being used interchangeably (Rocha et al. 2001). This family contains a few species that 36 spawn (lay egg masses) intermittently, with no somatic growth between spawning events 37 (Nigmatullin & Laptikhovsky 1994, Nigmatullin 2011. For instance, Todarodes pacificus, an 38 ommastrephid squid, is a semelparous cephalopod mollusk that lays eggs by embedding oocytes 39 inside a large egg mass (Sakurai et al. 2013). Being an intermittent terminal spawner, the 40 female's feeding ceases prior to spawning (Bower & Sakurai 1996) in order to allocate all 41 available energy to spawning, during which the female undergoes strenuous muscular 42 contractions, involving the mantle, arms, and tentacles, while extruding the egg mass (Hamabe 43 1962). 44The multiple spawning events of semelparous species are assumed to be a programmed 45 reproductive strategy (Rocha et al. 2001); however, the reason why all spawning events by these 46 individuals occur in the final days or weeks of their life cycle remains unknown (lifespan ≈ 1 y) 47 (Rocha et al. 2001). For T. pacificus, the reported residual fecundity and potential fecundity are 48 >150,000 and 320,000-470,000 (Soeda 1956) respectively. Thus, it is possible that the multiple ...

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Effects of temperature on embryonic development and paralarval behavior of the neon flying squid Ommastrephes bartramii

Cited by 16 publications

References 43 publications

Zoogeographic patterns of pelagic oceanic cephalopods along the eastern Pacific Ocean

Zoogeographic patterns of pelagic oceanic cephalopods along the eastern Pacific Ocean

Observations on the spawning behavior, egg masses and paralarval development of the ommastrephid squid Todarodes pacificus in a laboratory mesocosm

Male copulatory behavior interrupts Japanese flying squid Todarodes pacificus female spawning activity

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