scholarly journals BIODIVERSITAS ECHINODERMATA BERDASARKAN TIPE HABITATNYA DI PANTAI INDRAYANTI, GUNUNGKIDUL, YOGYAKARTA (BIODIVERSITY ECHINODERMS BASED ON HABITAT TYPE IN INDRAYANTI BEACH, GUNUNG KIDUL, YOGYAKARTA)

2018 ◽  
Vol 6 (4) ◽  
pp. 409-414
Author(s):  
Patric Erico Rakandika Nugroho ◽  
Pudjiono Wahyu Purnomo ◽  
Suryanti Suryanti
Keyword(s):  
Intertidal Zone ◽  
Sea Urchins ◽  
Habitat Type ◽  
Dead Coral ◽  
Sampling Points ◽  
Shell Fragment ◽  
Echinometra Mathaei

Pantai Indrayanti merupakan salah satu pantai berbatu yang ada di kabupaten Gunungkidul. Pantai Indrayanti memiliki biodiversitas flora dan fauna yang cukup tinggi, hal ini dilihat dari banyaknya makhluk hidup khas pantai berbatu yang menghuni wilayah ini. Kebanyakan Echinodermata ditemukan pada tempat-tempat tertentu atau mempunyai zonasi. Hal tersebut diduga berhubungan dengan vegetasi atau rumput laut yang telah tumbuh di daerah tersebut. Adanya pasang surut yang jelas juga diduga menjadi penyebab lain terjadinya zonasi tersebut. Penelitian ini bertujuan untuk menjawab pertanyaan bagaimana zonasi Echinodermata pada zona intertidal di Pantai Indrayanti. Penelitian dilaksanakan pada Maret 2017 di kawasan perairan Pantai Indrayanti. Lokasi penelitian sendiri berada di Pantai Indrayanti yang kemudian dibagi menjadi tiga stasiun antara lain stasiun 1 sebagai daerah dengan tipe habitat karang mati , stasiun 2 sebagai daerah dengan tipe habitat pecahan karang dan pasir kemudian stasiun 3 sebagai daerah dengan tipe habitat karang mati, lamun dan pasir. Masing-masing stasiun yang telah dipilih kemudian dibagi menjadi tiga titik sampling yang nantinya digunakan sebagai titik pengambilan sampel. Pada lokasi penelitian di temukan sebanyak 2 jenis Echinodermata yaitu bulu babi dan bintang mengular. Spesies bulu babi yang ditemukan ada 3 jenis yaitu Stomopneustes sp, Echinometra sp, dan Echinometra mathaei. Spesies bintang mengular yang ditemukan ada 2 jenis yaitu Ophiocoma erinaceus dan Ophiocoma scolopendrina. Stasiun 1 dan 2 dengan daerah tipe habitat karang mati dan pecahan kerang beserta pasir paling banyak ditemukan Echinodermata dibandingkan dengan stasiun 3 dengan tipe habitat pecahan karang mati, lamun, dan pasir. Indrayanti Beach is one of the rocky beaches in Gunungkidul district. Indrayanti beach has a biodiversity of flora and fauna is quite high, it is seen from the number of living creatures typical of rocky beaches that inhabit this region. Most Echinoderms are found in certain places or have zoning. It is thought to be related to vegetation or seaweed that has grown in the area. The presence of a clear tidal is also suspected to be another cause of the occurrence of the zonation. This study aims to answer the question of how the zonation of Echinodermata in the intertidal zone at Indrayanti Beach. The research was conducted in March 2017 in Indrayanti Beach waters area. The research location itself is located at Indrayanti Beach which is then divided into three stations such as station 1 as area with dead coral habitat type, station 2 as area with habitat type of broken coral and sand then station 3 as area with dead coral habitat type, seagrass and sand . Each selected station is then divided into three sampling points which will be used as sampling points. At the location of the study found as many as two types of echinoderms, which are sea urchins and snake stars. Species of pigs found there are 3 types of Stomopneustes sp, Echinometra sp, and Echinometra mathaei. Infectious star species found there are 2 types of Ophiocoma erinaceus and Ophiocoma scolopendrina. Station 1 and 2 with dead coral habitat type and shell fragment with sand found most Echinodermata compared with station 3 with habitat type of dead corals, seagrass, and sand.

scholarly journals Distribution of Sea Urchins in Punta Dumalag, Matina Aplaya, Davao City

2018 ◽  
Vol 1 ◽  
pp. 4
Author(s):  
Marnie Grace I. Sonico
Keyword(s):  
Full Article ◽  
Species Diversity ◽  
Dissolved Oxygen ◽  
Sea Urchin ◽  
Intertidal Zone ◽  
Sea Urchins ◽  
Diversity Analysis ◽  
Echinometra Mathaei ◽  
Diadema Setosum ◽  
Physicochemical Measurements

This study investigated the distribution and diversity of sea urchins along the intertidal zone of Punta Dumalag, Matina Aplaya, Davao City. A total of 100 quadrats (1m x 1 m) spaced 5 m apart, in 3 transects laid perpendicular to the shoreline, recorded a total of 347 individuals, resolved into 5 species, namely, Echinometra mathaei (rock- boring or common sea urchin), Echinothrix calamaris (Hatpin urchin), Diadema setosum (long-spine or “tuyom”), Prionocidaris verticillata (rough spine urchin), and Diadema savignyi. Among the 347 individuals recorded, Echinometra mathaei was the most abundant in the site with a total of 286 individuals. Shannon-Weiner Diversity Analysis (0.602) suggests low species diversity. Physicochemical measurements such as water temperature, pH, dissolved oxygen, and salinity revealed that the study site is suitable for the culture of sea urchins. Read full article here.

scholarly journals Distribution and density of the mollusk Donax striatus (Linnaeus, 1767) in a tropical estuarine region in the brazilian semi-arid

2015 ◽  
Vol 75 (4) ◽  
pp. 914-922 ◽  
Author(s):  
E. L. Medeiros ◽  
G. V. Fernandes ◽  
G. G. Henry-Silva
Keyword(s):  
Intertidal Zone ◽  
Significant Positive Correlation ◽  
River Estuary ◽  
Temporal Distribution ◽  
Average Density ◽  
Spatial And Temporal Distribution ◽  
Tropical Estuarine ◽  
Sampling Points ◽  
Estuarine Region ◽  
Semi Arid

Abstract This study evaluated the spatial and temporal distribution and density of the bivalve Donax striatus, at beaches close to the Apodi/Mossoró River estuary, through, six semiannual sampling campaigns were performed between April/2009 and October/2011. The sampled area was delimited by 20 transects that were laid perpendicular to the beach line and extended over 300 m in the intertidal zone. Seven sampling points were established in each transect, organisms and sediment were collected, and water temperature and salinity were recorded. The highest D. striatus average density (103 individuals.m–2) was observed in April/2009 and the lowest (18 individuals.m–2) in October/2010. The highest D. striatus densities occurred in beaches further from the estuarine region as demonstrated by a significant positive correlation (r2 = 0.67 and p = 0.0007). The D. striatus densities presented significant negative correlations with the percentages of organic matter in the water. This species demonstrated an aggregated distribution in the studied area.

Reproduction of the sea urchins Echinometra mathaei and Diadema savignyi on the South African eastern coast

1995 ◽  
Vol 46 (4) ◽  
pp. 751 ◽  
Author(s):  
AE Drummond
Keyword(s):  
South African ◽  
Sea Urchins ◽  
Gonad Index ◽  
Extended Period ◽  
Eastern Coast ◽  
The South ◽  
Annual Cycles ◽  
Echinometra Mathaei ◽  
Reproductive Cycles

The reproductive cycles of Echinometra mathaei and Diadema savignyi on the South African eastern coast were investigated by means of gonad index and histological methods. Both species showed annual cycles, with spawning occurring during the summer months (December to March-April), but the degree of gametogenic synchrony differed markedly between the two species. In D. savignyi, gametogenesis within and between sexes was in close synchrony and there was evidence suggesting that repeated spawning with a monthly rhythm occurred. In contrast, gametogenesis in E. mathaei was poorly synchronized and spawning occurred over an extended period.

scholarly journals Community structure of Echinoderms in seagrass beds of Pacitan beaches, East Java, Indonesia

2019 ◽  
Vol 20 (7) ◽  
Author(s):  
FARID KAMAL MUZAKI ◽  
EDWIN SETIAWAN ◽  
GHULAM FATHIR AUTHAR INSANY ◽  
NURUL KUSUMA DEWI ◽  
IWENDA BELLA SUBAGIO
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Sea Urchins ◽  
Diversity Index ◽  
Diversity Indices ◽  
Seagrass Beds ◽  
Sea Star ◽  
Echinometra Mathaei ◽  
Belt Transect ◽  
Diadema Setosum

Abstract. Muzaki FK, Setiawan E, Insany GFA, Dewi NK, Subagio IB. 2019. Community structure of Echinoderms in seagrass beds of Pacitan beaches, East Java, Indonesia. Biodiversitas 20: 1787-1793. In this study, we attempt to access diversity and community structure of Echinoderms on seagrass beds in each three belt transect (width 2 m, length 100 m) in Tawang and Pidakan beaches, Pacitan, East Java, Java. Observed parameters were species richness, composition, and abundance, as well as diversity indices: Shannon-Wiener's diversity index (H'), Simpson's dominance index (D) and Pielou's evenness index (J). At the end of the study, we identified one species of sea star (Asteroidea), seven species of brittle stars (Ophiuroidea), ten species of sea cucumbers (Holothuroidea) andnine species of sea urchins (Echinoidea). The most dominant species were Ophiocoma dentata (F. Ophiocomidae), Diadema setosum (F. Diadematiidae), Ophiomastix annulosa (F. Ophiocomidae) and Echinometra mathaei (F. Echinometridae). Value of H’ ranged from 0.538 to 1.252 in Tawang and 1.041 to 1.704 in Pidakan; which showing higher species richness and diversity in Pidakan. Echinoderm in the study area was not evenly distributed; D. setosum was very dominant in Tawang beach, while those three other species were more common in Pidakan. Furthermore, most of Holothuroid and Ophiuroid were found only in Pidakan which have relatively more complex habitat.

scholarly journals Why the urchin lost its spines: hydrodynamic forces and survivorship in three echinoids

1996 ◽  
Vol 199 (3) ◽  
pp. 717-729 ◽  
Author(s):  
M Denny ◽  
B Gaylord
Keyword(s):  
Surf Zone ◽  
Sea Urchins ◽  
Adaptive Significance ◽  
Hydrodynamic Forces ◽  
Morphological Adaptation ◽  
West Pacific ◽  
Echinometra Mathaei ◽  
Wave Induced

Two species of sea urchins (Colobocentrotus atratus and Echinometra mathaei) commonly co-occur on wave-swept intertidal shores in the Indo West Pacific. E. mathaei is a typical spiny urchin and is confined to cavities in the rock. In contrast, C. atratus has an unusual morphology, in which the spines are much reduced, and is found on substrata fully exposed to wave-induced velocities and accelerations. Previous researchers have suggested that spine reduction may therefore be a morphological adaptation to hydrodynamic forces. However, measurement of the drag, lift and accelerational forces on sea urchins show that the adaptive significance of spine reduction is less straightforward than it initially appears. The reduction in drag in C. atratus as compared with that in E. mathaei is to a large extent offset by an increase in lift. Instead, the 'streamlined' morphology of C. atratus seems best adapted to provide a reduction in the force imposed by water acceleration, thereby making it feasible for C. atratus to venture safely into the tumultuous flows of the surf zone.

scholarly journals Physiological and behavioral response of the Asian shore crab,Hemigrapsus sanguineus, to salinity: implications for estuarine distribution and invasion

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5446 ◽  
Author(s):  
David M. Hudson ◽  
D. Joseph Sexton ◽  
Dinsdale Wint ◽  
Connor Capizzano ◽  
Joseph F. Crivello
Keyword(s):  
Intertidal Zone ◽  
Habitat Type ◽  
Rocky Intertidal ◽  
Shore Crab ◽  
High Survival ◽  
Hemigrapsus Sanguineus ◽  
Optimal Salinity ◽  
Species Dominance ◽  
Wide Range ◽  
Asian Shore Crab

The invasive Asian shore crab,Hemigrapsus sanguineus, is ubiquitous in the rocky intertidal zone of the western North Atlantic. A likely contributor to this colonization is thatH. sanguineusis able to handle a wide range of salinities, and is thus more likely to spread through a greater geographic area of estuaries. This study investigated the salinity effects on this animal by observing survival across a range of salinities, the maintenance of hemolymph osmolality under different salinities, and behavioral preference for and avoidance of salinities.H. sanguineusshowed high survival across a broad range of salinities, had little change in hemolymph osmolality over a short-term salinity shock, and behaviorally distinguished between salinities when presented with a choice, under both acclimation salinities of 5 PSU or 35 PSU. Such results suggestH. sanguineushas a hardiness for the rapid changes in salinity that happen in the intertidal zone, yet is capable of physically moving to a more optimal salinity. This enhances their competitiveness as an invader, particularly surviving lower salinities that present challenges during high-precipitation events in rocky intertidal areas, and partially explains this species’ dominance in this habitat type.

scholarly journals DISTRIBUTION AND ABUNDANCE OF MACROALGAE IN INTERTIDAL ZONE OF DRINI BEACH, GUNUNGKIDUL, DIY

2015 ◽  
Vol 2 (1) ◽  
pp. 514 ◽  
Author(s):  
Wiga Pratama ◽  
Shinta C. Dewi ◽  
Ihda Z.R. Sari ◽  
Anisa Hardiyati ◽  
Allan E. Wajong
Keyword(s):  
Data Analysis ◽  
Air Temperature ◽  
Red Algae ◽  
Intertidal Zone ◽  
Physicochemical Parameters ◽  
Temperature Data ◽  
Sampling Point ◽  
Percent Cover ◽  
Sampling Points ◽  
Water Temperature Data

<p>Macroalgae is a macroscopic algae living in the intertidal zone. Based on the dominant pigment algae can be divided into 3 groups, there are Chlorophyta (green algae), Phaeophyta (brown algae), and Rhodophyta (red algae). Macroalgae have ecological and economic roles that are beneficial for humans. This research aims to study of distribution and abundance of macroalgae in the intertidal zone of Drini Beach, Gunungkidul, Yogyakarta. The study was conducted on June 8, 2013. Data were collected using plot method with 100 x 100 cm2 quadratic plot at 17 sampling points. Measurement of physicochemical parameters in each sampling point including salinity, air temperature and water temperature. Data analysis was performed by calculating the percent cover of each type macroalgae. The results showed that macroalgae were found consist of 9 types of Rhodophyta, 7 types of Chlorophyta and 2 types of Phaeophyta. The highest abundance of macroalgae was Rhodophyta (50,76%), followed by Chlorophyta (43,37%) and the lowest one was Phaeophyta (5,88%). The highest abundance of macroalgae species is Chaetomorpha crassa (26,91%) and the lowest one is Gigartina sp. (0,02%). <br /><strong></strong></p><p><strong>Keywords</strong>: Distribution, Abundance, Macroalgae, Intertidal</p>

scholarly journals PERTUMBUHAN POPULASI BULU BABI (Echinometra mathaei) DI PERAIRAN PESISIR KIMA BAJO KABUPATEN MINAHASA UTARA

2010 ◽  
Vol 6 (2) ◽  
pp. 73
Author(s):  
Ruddy D Moningkey
Keyword(s):  
Sea Urchin ◽  
Sea Urchins ◽  
Regression Line ◽  
Morphological Characters ◽  
Shell Morphology ◽  
Shell Diameter ◽  
Natural Logarithm ◽  
Significant Difference ◽  
Echinometra Mathaei ◽  
Line Intercept

Sea urchins of different colors were collected 50 individuals each and measured their morphological characters. The data were then transformed to natural logarithm and analyzed using regression. The comparison of the regression line intercept for the shell diameter-height relationship did not show any difference, but there was a significant difference for the shell lenght-heigth relationship. The comparison between different colors exhibited variations in the shell morphology of each sea urchin population. The growth of black spined-sea urchin (Echinometra mathaei), was negative allometric; the fact that they were mostly found in the narrow crevices might have influenced their growth.

scholarly journals Jenis-Jenis Bintang Laut Dan Bulu Babi (Asteroidea, Echinoidea: Echinodermata) Di Perairan Pulau Cilik, Kepulauan Karimunjawa

2018 ◽  
Vol 21 (1) ◽  
pp. 41
Author(s):  
Retno Hartati ◽  
Endika Meirawati ◽  
Sri Redjeki ◽  
Ita Riniatsih ◽  
Robertus Triaji Mahendrajaya
Keyword(s):  
Sea Urchin ◽  
Sea Urchins ◽  
Habitat Type ◽  
Line Transect ◽  
Sea Star ◽  
Acanthaster Planci ◽  
Sea Stars ◽  
Transect Line ◽  
Linckia Laevigata ◽  
Diadema Setosum

Abstract Types of Star Fish and Sea Urchins (Asteroidea, Echinoidea: Echinodermata) In Cilik Island, Karimunjawa WatersEchinoderms are fundamentally good indicators of health and status of coralline communities in marine waters.  Substrat of  sandy, rububle and coral reefs are good habitat for Asteroidea dan Echinoidea.  This study aim to identify sea star (Asteroidea) and sea urchin (Echinoidea) species from Pulau Cilik waters of Karimunjawa Islands. Asteroidea and Echinoidea observed using the line transect method used, ie subjects within the same distance between the transect and the transect square with observations of 2.5 m on the right and left of transect line line. Morphology, habitat type (substrate & depth) and total number of sea stars and sea urchins at each station were determined. The results showed that Pulau Cilik has six species of Asteroidea (Sea star), ie Linckia laevigata, L. multifora, Neoferdifla ocellata (Family Ophidiasteridae), Luidia alternate (Luidiidae Family), Culcita novaeguineae (Family Oreasteridae) and Acanthaster planci which belongs to Family Acanthasteridae. There were 4 species of Echinoidea Sea urchin) found, i.e. Diadema setosum, D. antillarum, D. savignyi and Echinothrix calamaris, which all were family members of Diadematidae Keywords: Ophidiasteridae, Luidiidae, Oreasteridae, Acanthasteridae, Diadematidae AbstrakEchinodermata pada dasarnya merupakan indikator kesehatan dan status dari terumbu karang di laut. Dasar perairan yang landai dengan substrat pasir, terumbu karang dan pecahan karang yang merupakan habitat bagi hewan jenis Asteroidea dan Echinoidea. Penelitian ini bertujuan untuk mengidentifikasi henis-jenis bitang laut dan bulu babi dari perairan Pulau Cilik, Kepulauan Karimunjawa. Pengamatan Asteroidea dan Echinoidea menggunakan metoda line transect yang dimodifikasi, yaitu mengamati subjek dalam jarak yang sama sepanjang garis transect dan kuadrat transect dengan pengamatan 2,5 m di sebelah kanan dan kiri garis line transect. Morfologi, tipe habitat (substrat & kedalaman) dan jumlah total bintang laut dan bulu babi di tiap stasiun dicatat selanjutnya sampel diidentifikasi berdasarkan ciri morfologi tersebut. Hasil penelitian menunjukkan bahwa di perairan Pulau Cilik ditemukan enam spesies Asteroidea (Bintang Laut), yaitu Linckia laevigata, L. multifora, Neoferdifla ocellata (Famili Ophidiasteridae), Luidia alternate (Famili Luidiidae), Culcita novaeguineae (Famili Oreasteridae) dan Acanthaster planci yang termasuk dalam Famili Acanthasteridae. Species Echinoidea (Bulu Babi) ditemukan 4 spesies  Diadema setosum, D. antillarum, D. savignyi dan Echinothrix calamaris  semua anggota famili Diadematidae.Kata kunci : Ophidiasteridae, Luidiidae, Oreasteridae, Acanthasteridae, Diadematidae

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