Fecundity and reproductive habits in <i>Patagonotothen tessellata</i> (Richardson, 1845) from the Beagle Channel, Argentina

Rae, G. A.; Calvo, Jorge

doi:10.1017/s0954102095000332

Cited by 34 publications

(19 citation statements)

References 12 publications

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“…Egg-guarding behaviour (commonly fanning of eggs and aggression towards intruders) has been reported previously in just a few notothenioids. These include Harpagifer species, in which either or both sexes may be involved (Daniels 1978), the Antarctic nototheniid Lepidonotothen nudifrons (Hourigan & Radkte 1989), and the non-Antarctic nototheniid Patagonotothen tessellata (Rae & Calvo 1995). Additionally, egg-guarding behaviour has been observed in the channichthyid Chaenocephalus aceratus from near Bouvet Island by participants in ICEFISH 2004 (Eastman, personal communication 2005).…”

Section: Discussionmentioning

confidence: 99%

Spawning behaviour and early development in the naked dragonfish Gymnodraco acuticeps

et al. 2005

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Nesting sites of the naked dragonfish Gymnodraco acuticeps have been identified in 15-35 m water under fast ice adjacent to McMurdo Station, making it possible to examine embryonic development and early larval growth. Egg-laying (predominantly in October) is preceded by a distinctive whirling behavioural pattern driven by the male prodding the side of the female's abdomen. The eggs (3.42 ± 0.19 mm in diameter) are laid on rocks as a single adherent layer (c. 2500 per patch). Development is unusually protracted, the first cleavage occurring after about 24 hr at about -1.9ºC. Hatching occurs about 10 months post-fertilization, beginning soon after the sun rises above the horizon. During this period one of the parents may act as a guard in an attempt to keep predators at bay. Upon hatching, the larvae (12.09 ± 0.36 mm long) swim towards the surface ice where they presumably seek refuge. Yolk absorption is complete in about 15 days. Larvae (grown in aquaria at a density of 0.7 larvae l -1 ) display an average daily growth rate of 0.42% over nine weeks. Hatching in aquaria can occur up to 100 days in advance of that seen in the field, suggesting that under natural conditions hatching may be delayed until an appropriate stimulus (such as the return of the sun) is received.

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Section: Discussionmentioning

confidence: 99%

Spawning behaviour and early development in the naked dragonfish Gymnodraco acuticeps

et al. 2005

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“…Each male guards egg masses spawned by several females in nests under flat rocks in lower levels of the intertidal zone of the Beagle Channel. Female P. tessellata spawn 7600-62,000 oocytes with a diameter of 1000 to 1500 µm (Rae and Calvo, 1995;. P. cornucola has not specifically been studied but preliminary observations indicate a similar timing of spawning (unpubl.…”

Section: Discussionmentioning

confidence: 99%

Somatic energy content and histological analysis of the gonads in Antarctic fish from the Scotia Arc

Vanella¹,

Calvo²,

Morriconi³

et al. 2005

Sci. Mar.

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“…This suggests egg brooding in both species. Parental care has also been observed in a Patagonian nototheniid, Patagonotothen tessellata Richardson (Rae & Calvo 1995).…”

Section: Introductionmentioning

confidence: 92%

Evidence for egg brooding and parental care in icefish and other notothenioids in the Southern Ocean

Kock

Pshenichnov²,

DeVries

2006

Antartic science

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Abstract:One of the least known Antarctic fish species is the icefish Chionobathyscus dewitti described first in 1978. Some of its reproductive characteristics appear to be similar to other channichthyids of similar size and shape. Females close to spawning have gonado-somatic indices (GSIs) of more than 20, and absolute fecundity was 2967 to 15612 oocytes in females 33-62 cm long. Relative fecundity was 7.6 in one female. Spawning has been observed in the Ross Sea at 1300 to 1500 m depth from January to March. Chionobathyscus dewitti may exhibit a remarkable egg carrying behaviour: eggs stick together in batches around the pelvic fins of females. The comparatively large number of mature males observed with no indication of an egg batch attached to their ventral fins makes it unlikely that males are involved in egg carrying. The few larvae of C. dewitti caught so far occurred from October onwards. Their size indicates that they have hatched as early as September. This suggests an incubation period of at least six months. We compare this with parental care reported in other notothenioids.

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Fecundity and reproductive habits in Patagonotothen tessellata (Richardson, 1845) from the Beagle Channel, Argentina

Cited by 34 publications

References 12 publications

Spawning behaviour and early development in the naked dragonfish Gymnodraco acuticeps

Spawning behaviour and early development in the naked dragonfish Gymnodraco acuticeps

Somatic energy content and histological analysis of the gonads in Antarctic fish from the Scotia Arc

Evidence for egg brooding and parental care in icefish and other notothenioids in the Southern Ocean

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