Annual Reproductive Cycles of the Chitons, Katherina Tunicata and Mopalia Hindsii

Giese, Arthur C.; Tucker, J. S.; Boolootian, Richard A.

doi:10.2307/1539040

Cited by 23 publications

(9 citation statements)

References 12 publications

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“…; Ishiyama‐Cervantes ; Sotil‐Caycho ); most authors prefer to describe the reproductive season based on the gonadosomatic index (Giese et al . ; Lawrence et al . ; Murti and Nagabhushanam ; Webber and Giese ; Glynn ; Barnes ; Himmelman , ; Pearse ; Nagabhushanam and Deshpande ; Cruz and Sotela ; Sakker ; Peña‐Monardez et al .…”

Section: Discussionmentioning

confidence: 99%

“…; Yoshioka ; Currie ; Soliman et al . ,b), the count of newly spawned eggs (Yoshioka ), the oocyte diameter frequency distributions (Webber and Giese ; Pearse ; Nagabhushanam and Deshpande ; Cruz and Sotela ; Sakker ; Ituarte and Arellano in press ), or the changes in the oocyte biochemical composition (Giese and Araki ; Aquinas‐Nimitz and Giese ). Studies performing histology give little information about the type of section (sagittal, frontal, transversal), or if a complete gonad or portion of it was taken, and none reflects a scale of GDS, and instead only considers the development of female gametes (oogenesis).…”

Section: Discussionmentioning

confidence: 99%

“…In fact, the studies about the reproductive season in polyplacophorans are not extensive and is just describe based on the gonadosomatic index, or the count of newly spawned eggs, or the oocyte diameter frequency distributions, or the changes in the oocyte biochemical composition (e.g., Giese et al . ; Giese and Araki ; Cruz and Sotela ; Yoshioka ).…”

Section: Introductionmentioning

confidence: 99%

“…The above makes it difficult to envision a consistent methodology for assigning GDS through histology, which can lead to a GDS assignment error and, therefore, to an imprecise reproductive season. In fact, the studies about the reproductive season in polyplacophorans are not extensive and is just describe based on the gonadosomatic index, or the count of newly spawned eggs, or the oocyte diameter fre-quency distributions, or the changes in the oocyte biochemical composition (e.g., Giese et al 1959;Giese and Araki 1962;Cruz and Sotela 1984;Yoshioka 1988).…”

Section: Introductionmentioning

confidence: 99%

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Observation and establishment of gonad development stages in polyplacophorans (Mollusca): Chiton (Chiton) articulatus a case study

et al. 2016

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Gonad development stages (GDS) and, subsequently, the reproductive cycle are described by performing histology of some gonad portions. In polyplacophorans, gametogenesis is not enough to define GDS; further anatomical gonad features are relevant. In most adult polyplacophorans, the gonad is a simple anatomical structure that resembles and operates as one single gonadal acinus without glandular structure. These features have gone unnoticed causing inaccurate GDS assignment and, consequently, imprecise reproductive season in polyplacophorans. Here, dissection protocols that allow extracting a compact gonad are established. Emphasizing the anatomical structure of the whole gonad and the displacement of gametes, five GDS were assigned to both sexes of Chiton (Chiton) articulatus: I‐goniogenesis, II‐development, III‐ripe, IV‐spawning, V‐rest. Tissue platelets contribute importantly to GDS assignment and even help distinguishing between males and females. Neither a randomly selected portion of gonad nor a longitudinal section are recommended because it leads to misinterpretation higher than 50% in determining GDS and besides ignores displacement of gametes. A panoramic sweep across a complete transverse‐section of each gonad was validated as the best option for establishing GDS. This new methodology was tested on several polyplacophorans species, and seems generally applicable for histological assessment of reproductive cycle and reproductive season in polyplacophorans.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Observation and establishment of gonad development stages in polyplacophorans (Mollusca): Chiton (Chiton) articulatus a case study

et al. 2016

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“…Several workers [7][8][9][10][11][12]14,23,24], have investigated the reproductive cycles of species of chitons by following changes in gonad weight. This method presents some problems because ripe gonads often shed gametes too rapidly to permit accurate weighing.…”

Section: Reproductive Cycles -Methods Of Investigationmentioning

confidence: 99%

Seasonal reproductive cycles of three Australian species of chitons (Mollusca: Polyplacophora)

Sakker

1986

International Journal of Invertebrate Reproduction and Developm

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1Studies were made of the seasonal reproductive cycles of Chiton pe/liserpentis, Onithochiton quercinus and Plaxiphora paeteliana. All are dioecious and not sexually dimorphic. The sex ratio is 1 : 1 in P. paeteliana, but is biased 2 : 1 in favour of males in 0. quercinus and C. pelliserpentis.The two chitonid species exhibited a bimodal reproductive cycle: 0. quercinus spawned in spring and autumn, with a peak in autumn and C. pe/liserpentis spawned in spring and autumn, with a peak in spring. The mopaliid P. paeteliana spawned for several months in spring and autumn, and the nature of the pattern was less clear.Gametogenesis in all species occurred during periods of increasing sea temperatures in late spring and early summer and during periods of decreasing temperature in late autumn, in each case following spawning. Phytoplankton levels were high at the time of spawning, although the larvae are presumed to be lecithotrophic.

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Reproductive cycle of Cryptochiton stelleri (Middendorff)

Tucker¹,

Giese²

1962

J. Exp. Zool.

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Annual Reproductive Cycles of the Chitons, Katherina Tunicata and Mopalia Hindsii

Cited by 23 publications

References 12 publications

Observation and establishment of gonad development stages in polyplacophorans (Mollusca): Chiton (Chiton) articulatus a case study

Observation and establishment of gonad development stages in polyplacophorans (Mollusca): Chiton (Chiton) articulatus a case study

Seasonal reproductive cycles of three Australian species of chitons (Mollusca: Polyplacophora)

Reproductive cycle of Cryptochiton stelleri (Middendorff)

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