Mehdi Bolouki Kourandeh, Reza Naderloo, Negin Khoroushi, Somayeh Zangiabadi,
Volume 10, Issue 2 (4-2021)
Abstract
The Persian Gulf has a different environment for corals compared to other parts of the world. 17 coral islands and some coastal areas in the northern part of the Persian Gulf as well as Chabahar Bay in the Oman Sea are the most important coral regions of Iran. The inaccessibility of coral islands and the dispersion of research have led to inaccurate information on the number of coral reef species identified. In this research, by field study of some coral regions such as Shidvar, Farsi, Kharg, Khargo, Hindurabi and Nayband, as well as collecting studies conducted by other researchers in other coral regions, thorough information about the diversity of coral species identified in the Persian Gulf have been presented. According to studies, the number of species of coral reefs identified in the Persian Gulf waters is 96 species, which by calculating 6 species of coral reefs that are reported only from Chabahar Bay, brings the number of species identified in Iranian waters to 102 species. The identified species are from 13 families and 40 genera, among which, Merulinidae and Acroporidae each with 29 and 23 species, respectively, have the highest diversity in terms of number of species. After these two families, Poritidae with 11 species has more diversity than other families. Among the studied islands, Larak Island has the highest number of species.
Mahdi Iranmanesh, Majid Askari Hesni, Mohammadreza Lashkari,
Volume 10, Issue 3 (9-2021)
Abstract
In this study the morphological body variation in five species of Gobiid fish from the intertidal zone of the Persian Gulf and Gulf of Oman have been investigated using 18 morphometric and also three meristic characters. According to the results, 19 of 21 morphological characters of studied species showed a significant statistical difference and among these species, the only two characters "total length" and "pre anal distance" were not statistically different. The results of linear discriminant analysis (LDA) had separated 24.95% of individuals by using morphological characters of the fish body. Data analysis by principal component analysis (PCA) showed that some of morphological characters could be more determinant in species separation in two first axis (PC1 and PC2) which occasionally are possessed in common between two studied species. On the other hand, calculating the Euclidean distance according to studied morphological characters represented that there are small differences in body shape of some species i.e. Boleophthalmus dussumieri and Scartelaos tenuis among other studied species. The results of this study revealed that studying the morphological characters in gobiid fish body shape using univariate and multivariate analysis could make a new vision in these morphological variations of fish body survival.
Rahil Nozarpour, Mehdi Ghodrati Shojaei, Reza Naderloo,
Volume 11, Issue 4 (12-2022)
Abstract
We studied the abundance, biomass and diet of Platevindex aff. tigrinus in the Hara Biosphere Reserve in the Persian Gulf. The seasonal sampling (two seasons) was conducted in winter 2018 and summer 2019. Samples were collected from six sites in Qeshm Island and Bandar Khamir. To determine the effect of environmental parameters on distribution of the species, temperature, salinity, pH, sediment grain size, total nitrogen and organic carbon were measured at each site. The results showed that the abundance of P. tigrinus was significantly higher in the winter compare to summer season. However, there was no significant difference in the biomass of the species between seasons. The PCA results showed that salinity, temperature and sediment grain size contributed to the separation of between seasons. The pH and total nitrogen followed the similar pattern in different sites and seasons. Although, temperature, salinity, sediment grain size, and organic carbon showed difference between seasons. The results showed that salinity and temperature were two important parameters in the distribution of the species during both seasons. The species was mainly feeding on the microphytobenthos during winter and on the sediment organic matter during summer.
Abdolbaset Dabirestan, Mehran Loghmani, Gilan Attaran,
Volume 13, Issue 2 (6-2024)
Abstract
This research was conducted with the aim of determining the biodiversity of Pertaran communities in three areas with mangrove cover and in 9 stations including one station in Gowatr Bay and 4 stations in each of Gowatr bay and Bahu Kalat on the eastern coast of Chabahar port. From each station, from the winter of 2019 to the fall of 2014, three sediment samples were collected seasonally for the separation and identification of sediments and one sample for the analysis of grain size and total organic matter of the sediments by Grab van Veen with a cross-sectional area of 0.028 square meters. In total, 12 genera belonging to 10 families were identified. Among the groups of the detected families of spionidae, the highest percentage of the average frequency with 13.70% was related to the Spionidae family. The survey of the density of the birds in total is 17800 ± 180 in the mentioned seasons, the average density of the birds in winter is 8720 ± 42 and the average density of the birds in the autumn is 9080 ± 181.63 in the mentioned seasons, the lowest average in winter is related to the Nereidae family: 0.5 600±67 and the most number was for Spionidae family: 1280±31.47 individuals in one square meter. The lowest average in autumn was related to the Nereidae family: 560 ± 32.65 and the highest to the Spionidae family: 1160 ± 62.94 individuals per square meter.
