Ecology and Reproductive Biology of the Senatorial Scallop<i>Chlamys senatoria</i>(Gmelin, 1791) in Gigantes Islands, Carles, Central Philippines

Morillo-Manalo, Laureen; Quinitio, Gerald F.; Laureta, Liberato V.; Añasco, Nathaniel C.; Monteclaro, Harold M.

doi:10.2983/035.035.0103

Cited by 5 publications

(10 citation statements)

References 13 publications

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“…The GSI provides information on how much the body is investing on the gonads (Giese and Pearse, 1974). Similar increase and decrease in GSI values in maturity and spawning were well documented (Cantillanez et al, 2005;Mouneyrac et al, 2008;Morillo-Manalo et al, 2016). Among bivalves, GSI has been used to assess and monitor the development of gonad (Lucas and Beninger, 1985;Lagade et al, 2014) because it is an easy and fast method to identify gonad stages rather than the use of histological analysis (Mouneyrac et al, 2008;Ben Salah et al, 2012).…”

Section: Discussionmentioning

confidence: 81%

“…Bivalves are known to undergo an annual reproductive cycle that involves gametogenesis followed by either a single or several spawning events, which are in turn followed by a period of gonad reconstitution (Crnčević et al, 2013). Some bivalves have unimodal or bimodal type of spawning which means they could either have a single spawning activity or have two spawning periods within a year (Mouneyrac et al, 2008;Ben Salah et al, 2012;Sawant and Mohite, 2013;Morillo-Manalo et al, 2016). However, Rai (1932) opined that under favourable condition spawning will occur throughout the year.…”

Section: Discussionmentioning

confidence: 99%

“…Studies on the reproductive biology of bivalves have been extensively conducted globally (Drummond et al, 2006;Chung. 2007;Jagadis and Rajagopal, 2007;Nakamura et al, 2010;Sawant and Mohite, 2013;Morillo-Manalo et al, 2016;Idris et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Several works focused on the seasonality of the gonad development of bivalves (Suja and Muthiah, 2007;Joaquim et al, 2008;Nakamura et al, 2010;Hamli et al, 2015;Idris et al, 2017). Recent findings revealed that spawning of some tropical bivalve species is protracted and that all gonad stages are present each month (Bantoto and Ilano, 2012;Morillo-Manalo et al, 2016;Idris et al, 2017). The continuous spawning and possible occurrence of these stages throughout a month may suggest lunar rhythm.…”

Section: Introductionmentioning

confidence: 99%

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Lunar periodicity in reproduction of two venerid clams Meretrix meretrix and Katelysia hiantina in Panguil Bay, Northern Mindanao, Philippines

Keith¹,

Juranes²,

Metillo³

2018

Int. J. Biosci.

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The venerid clams Meretrix meretrix and Katelysia hiantina are important component of shallow benthopelagic estuarine ecosystems, fisheries and cuisine in the Indo-West Pacific region. The uncontrolled and regular harvesting of these species may lead to population decline. Studies on aspects of growth and reproductive biology are indispensable input to the rational management of the clams. In this study, we examined lunar periodicity in growth through gross morphology measurements and reproductive potential of the two coexisting venerid species M. meretrix and K. hiantina from inner Panguil Bay, Philippines. For each clam species, thirty live samples per lunar phase sampling were collected during low tide from gleaners in situ from March to May 2017. Clams were individually measured for body length, width, inflation, and total weight, and dissected to obtain gonadosomatic index and fecundity that was estimated through volumetric method. Results showed no significant difference in growth for both clam species during each lunar phase. In contrast, significant differences were found for both fecundity and GSI for the two species to lunar phases. Furthermore, both species showed unimodal and bimodal peak for fecundity and GSI, with maximum values of M. meretrix peaking during new moon and full moon while those of K. hiantina only during full moon. We attribute these differences in GSI and fecundity peaks to reproductive niche differences of the two coexisting species in the brackish area of inner Panguil Bay. Hence, this study gives insight into the reproductive biology and potential for fisheries production of the studied venerid clams.

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Section: Discussionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Lunar periodicity in reproduction of two venerid clams Meretrix meretrix and Katelysia hiantina in Panguil Bay, Northern Mindanao, Philippines

Keith¹,

Juranes²,

Metillo³

2018

Int. J. Biosci.

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“…Other previous works on the popular commercially important scallop, Amusium pleuronectes, were done by Del Norte et al (1988) on its fishery in Lingayen Gulf and Gabral- Llana (1988) on growth, mortality, and recruitment in the Visayan sea. Recently, there have been reports on the related scallop species, Chlamys senatoria, by Morillo-Manalo et al (2016) on the ecology and reproductive biology in Gigantes Islands, Carles, Central Philippines and exploitation of three…”

Section: Introductionmentioning

confidence: 99%

Habitat Characteristic and Reproductive Biology of the Flat-ribbed scallop, Decatopecten radula (Linnaeus, 1758) on the Coastal waters of Guiuan, Eastern Samar

Cabacaba¹,

Boiser²,

Cosmiano³

et al. 2018

TPJF

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Decatopecten radula is highly sought for its shell meat making it as a source of food and income for local shellfish gatherers in Guiuan, Eastern Samar. This study provides biological information for future conservation and management. Data were obtained monthly in the three selected sites within coastal waters of Guiuan, Eastern Samar from January 2016 to December 2016. These scallops were distributed at shallow areas of Trinidad Tubabao Island, Kamandag Reef, and Magluto Reef in depths of approximately 1-5 meters throughout the sampling period. Scallops are abundant in Kamandag reef where the site is characterized by its rocky area and mainly composed of a sandy bottom. Scallops were found on the surface of the sediment, attached to rocks or hard elements, hidden in a seagrass and seaweed. Physico-chemical parameters were observed within a narrow and normal range. Water temperature did not vary widely from 28°C to 30°C while salinity, pH, and dissolved oxygen ranged from 33-34, 8.2-8.7, and 3.4-4.8 mg/L respectively. The results from the 825 scallops showed that D. radula is dioecious species with four gonad stages (developing, mature, spawning, spent) based on the histological examination and calculation of gonadosomatic index (GSI). The spawning period of the species is protracted and spawning peaks occur from August to November with a male-female sex ratio of 1:1.24. Size at sexual maturity reached 55 mm shell height (SH) in males and 60 mm SH in females. Thus, the collection of scallop should be limited to individuals >60 mm shell height.

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Lunar Periodicity in Reproduction of Senatorial Scallop (Chlamys Senatoria Gmelin, 1791) in Asid Gulf, Masbate, Philippines

Cabiles¹

2021

Croatian Journal of Fisheries

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In Masbate, senatorial scallop Chlamys senatoria is one of the five commercially important species of scallop present in Asid Gulf, but its basic biology is poorly understood in the Philippines. To provide biological information for future conservation and management, the reproductive rhythm of senatorial scallop in relation to lunar phase was investigated from October 2016 to March 2017. Scallops were collected daily from the fishers’ catches and were measured, dissected, and processed for histological analysis; whereas, fecundity and size of eggs (diameter) were also determined. Ecological parameter such as bottom water temperature was monitored during the sampling period. Results showed that C. senatoria is a highly fecund species, which ranges from 8.3 X 105 to 2.1 X 106 oocytes per female and its sizes (oocytes) ranges from 53.8 µm to 72.5 µm while Gonado-somatic index (GSI) ranges from 3.2 to 7.1. Fecundity, egg diameter, and the GSI decreased during new moon (NM) and full moon (FM). GSI indicates that the onset of spawning activity commences during NM and FM. Environmental parameters that were monitored showed significant variations in relation to lunar phase. Spawning of scallop C. senatoria follows a lunar reproductive pattern, which was initiated and influenced by the variations of different factors such as temperature, water amplitude, and light as the effect of lunar/tidal cycles. These findings indicate that reproduction and necessarily spawning in the scallop are related to factors associated with lunar phases. Strategies for managing the resource can be formulated using the temporal dimension of lunar phases.

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Ecology and Reproductive Biology of the Senatorial ScallopChlamys senatoria(Gmelin, 1791) in Gigantes Islands, Carles, Central Philippines

Cited by 5 publications

References 13 publications

Lunar periodicity in reproduction of two venerid clams Meretrix meretrix and Katelysia hiantina in Panguil Bay, Northern Mindanao, Philippines

Lunar periodicity in reproduction of two venerid clams Meretrix meretrix and Katelysia hiantina in Panguil Bay, Northern Mindanao, Philippines

Habitat Characteristic and Reproductive Biology of the Flat-ribbed scallop, Decatopecten radula (Linnaeus, 1758) on the Coastal waters of Guiuan, Eastern Samar

Lunar Periodicity in Reproduction of Senatorial Scallop (Chlamys Senatoria Gmelin, 1791) in Asid Gulf, Masbate, Philippines

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