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National Committee on Marine Sciences (NCMS)

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    Age, growth, and population structure of Conomurex luhunuas
    Sanchez-Escalona, Katherine; Aliño, Porfirio (National Fisheries Research and Development Institute, 2022-12)
    Age and growth dynamics of Conomurex luhuanus were investigated to determine the population structure. Age-specific change in shell shape determined with geometric morphometrics revealed discrimination of shape between 0-3 years old at 99–100% while 3–4 years old can be separated with 81% certainty. Using the age discrimination data, K and L∞ were estimated at 1.00 year and 7.28 cm, respectively. Recruitment is bimodal with natural mortality (M) of 0.71 and fishing mortality (F) approximated at 3.92 year. The exploitation rate (E) is 0.85 year, indicating probable overharvesting of the population under study. The presence of a deep-water population, age-specific burying behavior, and bimodal recruitment pattern are possible resilience factors.
    The study was supported by a grant from PCAARRD-DOST.
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    Fisheries Administrative Order No. 245-1. Series of 2013. Regulations and implementing guidelines on group tuna purse seine operations in high seas pocket number 1 as a special management area.
    (Department of Agriculture, 2013)
    The Order provides for conservation, management and sustainable producing bigeye, yellowfin, skipjack tuna stocks in the high seas and exclusive economic zones within the framework of International Convention on the Conservation and Management of Highly Migratory Fish Stocks in the Western and Central Pacific Ocean and adapted local resolutions in Philippines. This Administrative Order covers the registered traditional group seine fishing vessels granted access to the HSP1-SMA which is the area of the high seas bounded by the EEZs of the named Federated States in the Order with exact coordination by Vessel Monitoring System. The Order lays down requirements and criteria needed for any person, corporation or entity who intent to engage in group tuna purse seine operations in HSP-1SMA. Section B of the Order provides for procedure in the allocation of fishing access including letter of intent, preliminary list and allocation. The Order further lays down provisions for observe coverage, vessel monitoring system, reporting, vessel listing, monitoring of port landing, catch limit, net mesh size, nature of access right, use of fish aggregating device and penalties. The text consists of 17 Articles.