scholarly journals Prevalensi Dermatitis Ulseratif pada Tukik Lekang yang Dipelihara di Turtle Conservation and Education Centre Serangan

Author(s):  
Annabella Ruth Wijaya ◽  
Ida Bagus Windia Adnyana ◽  
I Made Kardena

Dermatitis ulseratif adalah penyakit yang paling sering menjangkiti penyu dan/atau tukik yang dipelihara di kolam-kolam penampungan, termasuk di Turtle Conservation and Education Centre (TCEC), Serangan. Penelitian dilakukan untuk mengetahui prevalensi, gambar patologi, dan lokasi jejas dermatitis ulseratif pada tukik lekang yang dipelihara di TCEC Serangan, serta perbedaan indeks kondisi tubuh tukik lekang penderita dermatitis ulseratif dengan tukik yang sehat. Prevalensi diketahui dengan menghitung jumlah tukik lekang penderita yang dibandingkan dengan total tukik di TCEC. Morfometri (straight carapace length, straight carapace width, curved carapace length, curved carapace width) dan berat badan tukik diukur untuk mengetahui indeks kondisi tubuh tukik lalu perbedaan indeks kondisi tubuh dibandingkan dengan Uji - T tidak berpasangan. Sampel jaringan kulit diproses menjadi preparat dan diwarnai dengan pewarnaan rutin Hematoxylin eosin(HE). Hasil penelitian ini yaitu : prevalensi dermatitis ulseratif pada tukik lekang di TCEC adalah 16,2%, ditemukan jejas luka dengan kerak kekuningan berdiameter 2 mm hingga 2 cm dan secara mikroskopis ditemukan infiltrasi heterofil dan sel mononuklear pada dermis kulit yang disertai dengan erosi, hiperkeratosis parakeratosis, dan materi nekrosis yang berisi debris sel. Jejas paling sering ditemukan pada area leher (63,04%), diikuti dengan flippers, kepala, kulit dekat karapas, kelopak mata, dan area leher dan flippers secara bersamaan. Terdapat perbedaan indeks kondisi tubuh yang sangat nyata antara tukik lekang penderita dengan yang sehat, dimana rerata indeks kondisi tubuh tukik penderita lebih besar dari yang sehat. Perlu dilakukan perbaikan manajemen pemeliharaan tukik di TCEC.

2020 ◽  
Vol 9 (4) ◽  
pp. 362-368
Author(s):  
Feny Amelia Br Ginting ◽  
Ali Djunaedi ◽  
Raden Ario

ABSTRAK: Tingkat keberhasilan hidup tukik menuju dewasa dapat ditentukan dengan pemberian pakan. Tetapi, saat ini jenis pakan yang paling tepat untuk tukik penyu belum diketahui. Pemberian jenis pakan dengan komposisi dan dosis yang tepat akan mempengaruhi tingkat pertumbuhan tukik penyu lekang dengan baik dan akan mempengaruhi keberhasilan hidupnya saat dilepaskan ke laut. Tujuan dari penelitian ini adalah mengetahui pengaruh pemberian pakan dengan komposisi yang berbeda terhadap pertumbuhan tukik Penyu Lekang (Lepidochelys olivacea) dan mengetahui tingkat kelulusan hidupnya selama masa pemeliharaan 5 Minggu. Lokasi penelitian dilakukan di Turtle Conservation and Education Center Serangan, Bali. Metode penelitian yang digunakan adalah metode eksperimental dengan menggunakan Rancangan Acak Lengkap (RAL) dengan 4 perlakuan yaitu ikan tongkol 100% (A),ikan tongkol 75% : kerang totok 25% (B), ikan tongkol 50% : kerang totok 50% (C), ikan tongkol 25% : kerang totok 75% dan masing- masing 3 ulangan disetiap perlakuan. Tukik Penyu Lekang diberikan pakan setiap pagi dan sore, dan diukur pertambahan berat, panjang, lebar dan morfologinya setiap 1 minggu sekali. hasil penelitian dapat disimpulkan bahwa pemberian pakan Ikan Tongkol dengan perbandingan komposisi yang berbeda memberikan pengaruh yang sangat nyata (p < 0,05) terhadap laju pertumbuhan spesifik berat, panjang karapas, dan lebar karapas tukik Penyu Lekang. Pakan dengan komposisi Ikan Tongkol 100% merupakan pakan paling baik diantara perlakuan pakan lainnya, dengan menghasilkan tingkat laju pertumbuhan spesifik berat 1,43% perhari, panjang karapas 0,62% perhari dan lebar karapas 0,94% perhari.  ABSTRACT: The success rate of living for hatchlings to adulthood can be determined by feeding. However, it is currently unknown what type of feed is most suitable for turtle hatchlings. The provision of types of feed with the right composition and dosage will affect the growth rate of the lekang turtle hatchlings and will affect their success when released into the sea. The purpose of this study was to determine the effect of feeding with different compositions on the growth of Olive Ridley (Lepidochelys olivacea) hatchlings and to determine their survival rate during the 5 week rearing period. The research location was conducted at the Turtle Conservation and Education Center Serangan, Bali. The research method used was an experimental method using a completely randomized design (CRD) with 4 treatments, namely 100% tuna (A), 75% tuna: 25% totok (B), 50% tuna: 50% totok ( C), tuna 25%: 75% totok clams and 3 replications each in each treatment. Lekang Turtle Hatchlings are given food every morning and evening, and their weight, length, width and morphology gain is measured every 1 week. The results showed that feeding Tuna Fish with different composition ratios had a very significant effect (p <0.05) on the specific growth rate of weight, carapace length, and carapace width of the Lekang turtle hatchlings. Feed with 100% tuna composition is the best feed among other feed treatments, with a specific weight growth rate of 1.43% per day, carapace length 0.62% per day and carapace width 0.94% per day.


1974 ◽  
Vol 22 (3) ◽  
pp. 417 ◽  
Author(s):  
NA Campbell ◽  
RJ Mahon

A multivariate approach has been used to study morphological variation in the blue and orange-form species of rock crab of the genus Leptograpsus. Objective criteria for the identification of the two species are established, based on the following characters: width of the frontal region of the carapace; width of the posterior region of the carapace (rear width); length of the carapace along the midline; maximum width of the carapace; and the depth of the body. The first canonical variate, which differentiates between the two species, represents a contrast between the carapace width relative to the width of the front lip and the depth of the body; the blue-form species has a greater relative carapace width than has the orange form. The second canonical variate, which presents a contrast between the rear width and the carapace length, identifies males and females within each species; males have a greater relative carapace length than have females. All individuals, including 20 not used in the study, were correctly identified for colour form. The clear separation of the blue and orange forms achieved by canonical analysis supports the previously determined specific status of the two forms.


2011 ◽  
Vol 86 (4) ◽  
pp. 446-452 ◽  
Author(s):  
L.F. La Sala ◽  
A.M. Perez ◽  
S.R. Martorelli

AbstractThis study was conducted in two populations of crabs, Cyrtograpsus angulatus and Neohelice granulata from the Bahía Blanca Estuary, in Argentina, to identify risk factors for infection by the acanthocephalan Profilicollis chasmagnathi and to assess the association between infection and mortality of these hosts. Cyrtograpsus angulatus and N. granulata crabs were sampled seasonally over the course of a year, and spring sampling included collection of dead crabs predated by Olrog's gulls in a nearby breeding colony. Potential risk factors for infection were assessed and the number of cystacanth larvae per crab was counted. In C. angulatus, the odds of infection increased by 7% for each millimetre increase in carapace length, and were nearly 17 times greater in crabs sampled from the Olrog's gull feeding area compared with those sampled from nests in the breeding colony. For every millimetre increase in carapace length in N. granulata, the odds of infection increased by 13% in crabs from the breeding colony, and by 32% in crabs from the feeding area. Mean intensity of infection in N. granulata increased by 16.5% for each additional millimetre of carapace width. The level of parasite aggregation was lowest in the largest C. angulatus and highest in N. granulata predated by Olrog's gull. The results show that host size is the most important factor influencing infection prevalence in both crab species and intensity of infection in N. granulata, and suggest the presence of parasite-induced mortality in the populations studied.


2018 ◽  
Vol 132 (1) ◽  
pp. 8-17
Author(s):  
Terry Power ◽  
John Gilhen

Based on current knowledge of the ecology and distribution of Snapping Turtle (Chelydra serpentina), both in eastern Canada and elsewhere, we conclude this species is native to Cape Breton Island. Seventy-two reports of Snapping Turtle from Cape Breton (1999–2017) indicate a range centred in the area south of Bras d’Or Lake. Date of oviposition ranged from 19 June to 10 July (median = 26 June) among 26 nests observed during 2012–2014. Clutch size for these nests was 23–65 eggs (mean = 46) and among 25 protected nests average rate of hatchling emergence was 21.5%. Time from oviposition to emergence of hatchlings (n = 256) was 75–120 days (mean = 87.2; SD = 9.0) among 20 nests. First emergence ranged from 9 September to 20 October (75–114 nest days; mean = 90) and last emergence ranged from 13 September to 28 October (86–120 nest days; mean = 100). Duration of emergence ranged from one day (i.e., synchronous emergence; five nests) to 37 days (mean = 11 days). The number of days on which hatchlings emerged at a nest ranged from one to nine days (mean = 4 days). Maximum carapace length was 25.0–31.8 mm (mean = 29.0 mm) and maximum carapace width was 23.5–30.0 mm (mean = 27.0 mm) for 256 hatchlings that emerged from 20 protected nests. Mass of hatchlings was 4.9–9.9 g (mean = 7.8 g).


Author(s):  
John Davenport ◽  
Martha Spikes ◽  
Sarah M. Thornton ◽  
Bridget O. Kelly

Male diamondback terrapins,Malademys terrapin(190–240 g; 101–117 mm carapace length; 11–8 ±0–6 mm maximum jaw gape) selected small littorinids (<12 mm shell height) and mussels (<30 mm shell length) when offered prey of a range of sizes (at 26°C and 34‰. Jaw gape appeared to be the main constraint on feeding on molluscs. Responses to crabs were complex. Small crabs (10–25 mm carapace width) were eaten whole. Medium-sized crabs (30–50 mm carapace width) were ‘cropped’ (i.e.walking legs were eaten without killing the crabs). Large crabs (52–75 mm carapace width) were usually avoided, though terrapins sometimes took legs from pairs 3 or 4. Experiments with medium-sized crabs showed that diamondbacks evaluated crabs visually before attacking and preferred to eat crabs without chelipeds, rather than crabs with one or two chelipeds. Terrapins carried out attacks on medium-sized crabs from the side or rear and preferentially cropped leg pair 4 (the furthest from the chelipeds), even though leg pair 4 was significantly less valuable energetically than other leg pairs. Evidence is presented to show that cropping behaviour allows terrapins to exploit crabs which are too large to eat whole because of the constraints of jaw gape and the hard, smooth surface of the crab cephalothorax. Limb cropping is as energetically profitable as eating small crabs whole, but the threat posed by chelipeds causes terrapins to attack crab prey in the order small>medium>large.


2020 ◽  
Vol 18 (1-2) ◽  
Author(s):  
Rajko Roljić ◽  
Vera Nikolić ◽  
Nebojša Savić

This paper presents the information about morphological variability and sexual dimorphism of the stone crayfish (Austropotamobius torrentium) in the area of Korana River in Mrkonjic Grad. The crayfish were caught by hand made baited traps from October 2018 to May 2019. A total of 46 crayfish were caught, of which 33 males and 13 females. The dimensions of eight morphometric characteristics: body weight (W), body length (TBL), rostrum length (ROL), rostrum width (ROW), claw length (CLL), carapace length (CPL), carapace width (CPW) and abdomen length (ABL), were analyzed, both in males and females. Also, the body condition was determined for all individuales. The measurements results of morphometric characteristics partially matched into the alredy known range of variations. These data presens first ones for the observed area. By using Mann-Whitey U-test, it was noted that there are significant differences between the sexes for W, TBL, CLL, CPL, CPW and ABL. These resuls could be explained by sexual dimorphism of the stone crayfish.


Zootaxa ◽  
2009 ◽  
Vol 1982 (1) ◽  
pp. 66-68 ◽  
Author(s):  
SHANE T. AHYONG

Among the Brachyura from the Kermadec Islands in the invertebrate collection of the National Institute of Water and Atmospheric Research, Wellington, New Zealand (NIWA), are two specimens representing two deep-water species previously not known from the region. Both specimens were collected at the same station, together with the paratypes of the parthenopid crab, Garthambrus tani Ahyong, 2008. The new records are reported below to formally document their occurrence at the Kermadec Islands, New Zealand; both also represent the first records of their respective genera from New Zealand waters.  Measurements of specimens, in millimetres, refer to carapace length (cl) and carapace width (cw).


2017 ◽  
Vol 67 (3-4) ◽  
pp. 319-330 ◽  
Author(s):  
Sana Sharifian ◽  
Vahid Malekzadeh ◽  
Ehsan Kamrani ◽  
Mohsen Safaie

In the present study, population ecology and relationships between various morphometric characters of the sand-bubbler crab Scopimera crabricauda from the Persian Gulf (Iran) were studied. Crabs were collected monthly by excavating nine quadrats in high-density areas of open burrows at low, mid and high intertidal levels during spring low tides for one year. A total of 534 crabs was collected, of which 70% were males (and 30% females). Mean carapace width and total weight in both sexes showed significant differences. Crabs with a carapace width ranging from 5 to 7 mm were the dominant crabs in the population. The highest numbers of crabs were found in the higher intertidal area. The mean size of crabs decreased towards the sea. The aggregation of small crabs was found towards sea in female crabs. Juveniles were abundantly found from January to March whereas the sub-adults and adults were mostly found from April to January. The carapace length to carapace width relationship differed between males and females, as did the carapace width and carapace length to total weight relationships. Finally, the relationship between carapace width and weight for both sexes showed that the growth of this species is allometric.


Author(s):  
Przemysław Czerniejewski

Some aspects of population biology of the mud crab,The mud crab is the only non-indigenous xanthid encountered in the River Odra estuary. In 2007-2008, the crabs were collected, using fish traps, to determine sex and to follow variations in individual weight and carapace length and width over a year. Sex-dependent differences in the crab morphometry were studied as well. The largest catch was that obtained in September (23.48% of the total number of 264 individuals) and October (31.82%). Male crabs accounted for 56.44% of the total number; males dominated in autumn (September-December) and spring (March, May, June) catches. Males showed significantly wider carapaces (16.81 ±3.98 mm; range: 5.60-22.90 mm) and mean individual weight (2.15 ±0.94 g; range: 0.15-3.93 g) than females (mean carapace width of 15.05 ±3.33 mm; range: 5.30-19.80 mm, and mean individual weight of 1.47 ±0.60 g; range: 0.13-2.56 g). Of the 11 morphometric characters analyzed, expressed in relative values (%), related to the carapace width, males showed significantly larger claw dimensions (CHL


1998 ◽  
Vol 19 (3) ◽  
pp. 281-291 ◽  
Author(s):  
Ertan TaŞkavak

AbstractMorphometric measurements and ratios were recorded in Euphrates soft-shelled turtles, Rafetus euphraticus, sampled in the Euphrates and Tigris rivers and tributaries, Southeastern Anatolia. According to nine morphometric ratios, there are clear differences between two allopatric populations of R. euphraticus, the specimens of the Tigris population being much flatter and having a wider carapace as compared with the Euphrates population. Male:female sex ratio was 2.7:1, no sexual dimorphism was present in the morphometric ratios. Rafetus euphraticus and Trionyx triunguis, which were considered congeneric in the past, differed from each other in the ratios of the carapace length/carapace width, carapace length/plane of the greatest carapace width, carapace length/plastron length, carapace length/rostrum length, carapace width/plastron length, carapace width/head width and plastron length/rostrum length.


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