Gastropods is an important organism that commonly found inhabiting the rocky intertidal area. Distribution pattern of this species is influenced by various factors such as population history, microhabitat, predation and a complex interactions between oceanographic dynamics and ecological features. This study aims to compare the temporal distribution pattern of gastropods at two different rocky intertidal area. This research was conducted at the rocky intertidal area of Amban and Nuni, North Manokwari District, West Papua. Data collection was performed during the daylight and night in April and June 2012 using systematic sampling method. The results showed that both physical and chemical factors are suite for supporting gastropods life. Furthermore, these factors seem to have an impact on gastropod zoning patterns observed in the study area. The similarity index values ​​indicate that the similarity of gastropod species between the two locations is low, which means that the species of gastropods found in each location is quite different. The community structure of gastropod at the study area is stable. In addition, we found that the gastropods diversity were higher during the night than the daylight because gastropods are classified as a nocturnal animals. Key Words: Gastropod; Rocky Intertidal; Community Structure; Nocturnal

Pengelolaan dan pelestarian keanekaragaman hayati berawal dari pengetahuan tentang ketersediaan sumberdaya, identifikasi, dan sistematika spesies. Banyaknya spesies Turbinidae dengan berbagai bentuk morfologi dan transformasi bentuk menjadikan identifikasi dengan gen COI sangat penting dalam mempercepat pengungkapan identitas spesies. Penelitian ini dilakukan dengan tujuan menganalisis pola pertumbuhan dan mengidentifikasi gastopoda Turbinidae dengan pendekatan DNA barcode. Hasil identifikasi berdasarkan karakter morfologi menunjukkan bahwa genus Turbo yang diamati adalah dari spesies Turbo stenogyrus. Analisis pola pertumbuhan menunjukkan bahwa pola pertumbuhan T. stenogyrus adalah allometrik negatif. Amplifikasi DNA dengan gen COI menghasilkan panjang sekuen DNA 650 bp dengan hasil identifikasi sesuai dengan pengamatan morfologi yaitu Turbo stenogyrus. Berdasarkan analisis filogenetik dan jarak genetik, sekuen DNA yang dianalisis membentuk clade yang sama dengan spesies Turbo stenogyrus dengan jarak genetik terdekat 4,2%. Analisis genetik melalui gen COI sangat baik dan memberi kemudahan dalam identifikasi spesies gastropoda.

Filum Sipuncula adalah biota laut unik, dari penampilan luarnya. Hewan ini mirip dengan cacing, sehingga diistilahkan peanut worm. Masyarakat pesisir Papua khususnya di Papua Barat telah memanfaatkan organisme ini sebagai bahan pangan, tetapi komposisi gizi dari spesies inu belum banyak dibahas. Penelitian dilakukan Maret-April 2014, bertujuan untuk mengetahui komposisi kimia dari Sipuncula nudus yang diambil dari perairan Raja Ampat dan Manokwari. Hasil menunjukkan bahwa kadar air S. nudus dari Kelurahan Sowi 4 Manokwari) yaitu 8.06%, kadar lemak tertinggi terdapat pada Kampung Amdui Raja Ampat) yaitu 1.70%, kadar protein tertinggi berasal dari Kampung Amdui Raja Ampat) yaitu 82.46%, karbohidrat tertinggi berasal dari Kelurahan Sowi 4 Manokwari) yaitu 7.26% dan kadar serat kasar Kelurahan Sowi 4 Manokwari) yaitu 1.05%. Sedangkan untuk kadar mineral besi dan kalsium tertinggi sampel dari Kampung Amdui Raja Ampat 11.07 Mg/100g dan kalsium sebesar 297.01Mg/100g. Sedangkan kadar mineral kalium tertinggi dari lokasi Kelurahan Sowi 4 Manokwari yaitu 207.48Mg/100g. Perbedaan ukuran panjang dan berat tidak memberikan pengaruh yang besar terhadap persentase kandungan gizi dan mineral dari Sipunculus nudus.

Arfak rainbow fish, Melanotaenia arfakensis is an endemic fish on several river systems in the northeastern part of the Vogelkop peninsula. This study aims to describe the growth, age at first maturity, and sexual dimorphism of this endemic fish on the Nimbai Stream and the Aimasi Stream, the Prafi River system. The fish were caught using handnet, then were measured their standard length and individual weight. Data were analyzed to estimated growth patterns, von Bertalanffy's growth rate, age at first maturity and sexual dimorphism characteristics. The results showed that male growth patterns varied, with a tendency of the increase in body length faster than that of body weight (negative allometric patterns) with b values ranging from 2.886 to 3.132. On the other hand, the female individuals had positive allometric patterns (b values ranged from 3.062 to 3.378). The growth rate (K) of male body length was faster (0.165-0.174) than that of female individuals (0.159-0.163). Male individuals reached the first maturity condition earlier (at age of 1.83-2.18 years) than female individuals (at age of 2.49-2.64 years). Sexual characteristics between the sexes are related to body height starting to appear when fish are of a standard length of larger than 18.22 mm or when male fish begin to approach the time of the first sexual maturity. Understanding of growth, age, and the characteristics of the sexual dimorphism of endemic fish has an important meaning in monitoring population conditions and for conservation efforts in their natural habitat.

In Indonesia, flyingfish are abundant and distributed in Makassar Strait, Flores Sea, Banda Sea, Sulawesi Sea, Maluku Sea, Arafura, Northern Sea of Papua, and Halmahera. The aims of this study were to analyse and describe the characteristics of flyingfish habitat, based on oceanographic conditions and eggs catches, and to visualize the variability in spatial and temporal patterns of predicted potential spawning grounds. The research was conducted in Fak-Fak and adjacent seas in the Indonesian Fisheries Area WPP 715, from 130°−134° E and 2°S−5° S. Data were collected during 2018 for selected months: June, July, August and September. Remote sensing data used in this study included chlorophyll-a concentration (Chl-a) OCI-Algorithm, Sea Surface Temperature (SST) 11μ daytime, Absolute Dynamic Topography (ADT), Significant Wave Height and Ocean Surface Current (meridian and zonal components). Fishery data were collected from fishermen’s GPS units, and through participatory mapping. Based on the mapping of fishing locations of flyingfish fishermen, there were four locations where fishing frequency was high. The potential fishing grounds were approximately 5-40 miles from mainland of Fak-Fak. Chlorophyll-a concentration in Fak-Fak waters ranged from 0.201–2.13 mg/m3. The temperature was estimated to be in the range of 27-31°C, with an average temperature of 27.1°C. ADT only changed by 0.01 cm in height each month with a range between 0.88–1.02 cm. Wind was one of the driving forces of geostrophic current. The waves reached a peak in August, with heights ranging from 0.70 to 1.6 metre. Flyingfish were predominantly found in oceanic zones.