National Committee on Marine Sciences (NCMS)
Permanent URI for this communityhttps://repository.unesco.gov.ph/handle/123456789/6
Browse
5 results
Search Results
- Ontogenetic variability in the diel activity pattern of the marine gastropod Cassis cornuta(Mollusca: Cassidae)Calle, Lala Grace; Cabaitan, Patrick C; Sayco, Sherry Lyn G; Tan, Shau Hwai; Conaco, Cecilia (Oxford University Press, 2024-01-25)Examining activity patterns is essential in understanding gastropod feeding and movement ecology. However, the diel activity patterns of large-bodied gastropods, such as Cassis cornuta, remain poorly studied. Here, we conducted outdoor hatchery-based experiments to examine the diel activity patterns of C. cornuta adults and juveniles under natural sunlight and photoperiod. Activities of C. cornuta, such as crawling, hunting, feeding, burrowing and resting on the substratum, were examined every hour for 3 days. Although most individuals were inactive for a greater part of the observation period, active behaviours were recorded for some individuals during both daytime and nighttime, suggesting that C. cornuta is cathemeral, as supported by a nonsignificant result from a Rayleigh's test of uniformity. A higher proportion of adult and juvenile C. cornuta were inactive, either burrowed or resting on the substratum, during the 24-h period. Peak activity time for juveniles started at 20:00, with up to 50% of individuals active, while peak activity time for adults started at 21:00, with up to 20% of active individuals. Adults spent more time resting aboveground, whereas juveniles spent more time burrowed under the sand when not feeding. Juveniles hunted more frequently and spent more time feeding compared to adults. Additionally, juveniles crawled faster and were more successful in capturing sea urchins than adults. The information on variability in the diel activity patterns and movement rates between adult and juvenile C. cornuta would allow further demographic studies, and provide insights into possible conservation strategies for this species.
- The Philippines – truly a diver’s paradise(The Manila Times Publishing Corporation, 2019-05-03)A tropical archipelago comprising 7,641 islands, the Philippines offers bodies of water, with highly diverse marine wildlife and seascape — perfect for all kinds of divers and deep diving enthusiasts to explore. This makes the country a popular major diving hub in Asia. With countless spots for divers of different skills, Philippine waters are suitable for beginners who are simply looking for fun recreational activities and most ideal for intermediate divers seeking underwater challenges to hone their skills and experts in search of new adventures.
- Pangasinan beachgoers warned vs jellyfishCardinoza, Gabriel (Philippine Daily Inquirer, Inc., 2014-04-16)The provincial disaster risk reduction and management council (PDRRMC) on Tuesday warned beachgoers to stay close to the shore when swimming in the Lingayen Gulf to avoid being stung by jellyfish. The warning was issued in anticipation of the influx of thousands of tourists heading for the different public beaches in Pangasinan province during the Holy Week. Avenix Arenas, PDRRMC spokesperson, said jellyfish sting could be fatal if the patient was not given immediate medical attention.
- Balloons, sky lanterns harm the environmentGamboa-Amante, Kitty (The Manila Times Publishing Corporation, 2019-01-10)The spectacle of the symbolic releasing of balloons and night sky lanterns is, without a doubt, a beautiful sight to behold and has become increasingly popular at festivals, weddings and other celebrations across the world. For Filipinos, the event is oftentimes symbolic and can even be observed in occasions such as burials. But after traveling for long distances and falling to the ground or waters, the burn-out and plastic remnants from the lanterns and balloons may not only litter the earth and seas, but can also hurt livestock and marine animals.
- Fishkill hits cages in Taal LakeCinco, Maricar (Philippine Daily Inquirer, Inc., 2018-11-06)The local government of Agoncillo town in Batangas province will distribute tilapia fingerlings to local cage operators affected by the recent fishkill in Taal Lake. The incidence of “fish mortality,” a term preferred by local officials in referring to a smaller area where fish turn belly up, occurred at Barangay Subic Ilaya, said Agoncillo Mayor Daniel Reyes. He said 105 cages, out of 1,555 operating in the town, were affected, with about P5 million worth of mature and juvenile tilapia killed in a phenomenon called “sulfur upwelling.”