SVIBOR - Project code: 1-08-116


Strossmayerov trg 4, HR - 10000 ZAGREB
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SVIBOR - Collecting Data on Projects in Croatia

Project code: 1-08-116

Applicable Biological Examinations of Decapods in Croatia

Main researcher: OBRADOVIĆ, JASNA (75233)

Type of research: developmental
Duration from: 04/20/95.

Papers on project (total): 90
Institution name: Veterinarski fakultet, Zagreb (53)
Department/Institute: Department of Anatomy, Histology and Embryology
Address: Heinzelova 55
City: 10000 - Zagreb, Croatia
Phone: 385 (0)1 2390 244
Fax: 385 (0)1 2314 697
E-mail: bacic (internet)
E-mail: slavica (internet)
E-mail: bacic (internet)
E-mail: slavica (internet)
Phone: 385 (0)41 717 705
Fax: 385 (0)41 717 705

Summary: The basic results about biological parameters of demersal species with continous monitoring of the condition of the population with more locations are used for gaining results, on how to preserve the integrity of the natural living riches of the Republic s sea. The main interest is given to the Nephrops norvegicus species, then to the other species of the same standpoint, because, already the preliminary results showed a high interaction of the nephrops with other species, but other species alsointeracted among each other, either one on top of other or on the whole biotop. The AREAS OF RESEARCH were: The Velebit channel, Kvarnerić, Kvarner, the Rjeka bay, the Blitvenica area, the Murter sea. With this the BASIC SCIENTIFIC DATEBASE is realized, with about 3 000 000 entries, from around 900 square nautic miles and 71 species, and each of them all in abundance in weight and number, sex and size, the structure of the population, the changability of the parameters in dependence to the seasons of the year, catching fish, kinds of fishing, areas, horizontal and vertical movements of the species, inside them, sex and aged groups, sexual cycles, areas in which sexual activities are present in certain season, the age of the earliest sexual maturity, the conduct of certain kinds of fish catching, the influence of ilumination. THE COMPARAMENT OF THE RESULTS. Results could not be compared to other results because a similar database has not been made before for the East coast of the Adriatic sea. Biological results from Project, in their mutual comparament showed that many parameters like the season of sexual activity of individual species, the time of massive changing and the growth of the nephrops, the presence of a specific, and even the manner of naurishment, differ in every season trough out the area of the Adriatic sea. The cartography of species by abundance in mass and number is compared to the last, similar cartography made in 1948. (Karlovac) for the whole Adriatic sea. It established 72 species and their source was one timed for weight of certain species on certain location. Trough out the Project the monitoring system was used, the surface of the research area was smaller and for each of 71 founded species 1 to 8 parameters were annotated. Cosequently, LONGTIMED CHANGES IN CONDITIONS OF THE LIVING RESOURCES sach as THE CHANGES IN BIODIVERSITY of the Adriatic sea could not have been determined by analizing the results of this project and earlier cartography. HISTOLOGICAL and HISTOCHEMICAL methods the enzimatic occurments of the nephrops ovary were determined. The egzogen factors have been folowed and those that inducate the change of the secretion of the neurohormonal organs have been established. Final results defined the function of the sexual cycle and the interaction of the environment on the occurrences. Results from biology showed that abundance interaction among species and the influence of certain fishing equipment respecting the configurative characteristics of the shore and the sea bad, are used for protecting the integrity of the living resours in the MODEL AREA (the Velebit channel). The result manifested itself during the duration of the Project: the increase of the average lenth of the population of the found species in 1991 in average for 40%, the increase of the entire fishing for an average of 410% and the natural come back of 22 species, so the area today is being densly populated by 49 economicaly important species and the species Monachus albiventer which is, as a protected species, a subject of an anather project. On other examined areas, as a difference to the Model area, the lenth of the population, in the same time, decreased, averagdy, for 70%, the number of present species also decreased, and the entre fishing mass totals 1.5% of the mass from the Model area. The research, about the effect of certain fishing means on the nephrops showed that the protection of the nephrops and other species is possible by regulating fishing, such as periodical catch and fishing absence, the seasonal changes of the fishing locations, the changes of the fishing means and the selection of the vesells motor strenth. On the basis of the gaind results a series of proposals has been given to the owners of the fishing areas (govermental organs). The structure of the project included carring out the ECOACTION of remuving the ship waste from sea bad at the depths 30-60 meters..

Keywords: Adriatic living resource, Adriatic database of biotop, Cartography of Adriatic species, Biodiversity of Adiatic, Decapods, Protection of marine living resource, Conservation of coastal zone , Fishery usefool manegement, Nephrops

Research goals: The global purpose of researching the Project was to protect the autohtone population of decapods of Croatia, as a contribution to protecting the integrity of the natural riches of the Croatian Republic and their racional governing during a longer period of time. During the research it has been expanded to examining the possibility of protecting the integrity of the total decapods biotop, and with this to preserve the BIODIVERSITY OF THE COASTAL AREA, as a wortier basis for the NATIONAL PROSPERITY. Thats how the number of individual purposes is increased while other purposes are added: establishing the condition of the biotop in its substance and establishing the biological and the fisheries characteristics of the species in it, and then following the maintenance of the changes of the come upon condition. In the same time using the scientific methods to establish and follow those biological and agricultural factors that may or have influence on the condition. To define species of factors to those which are possible to change and to those on which are cannot make the influence.Present the condition to the owner and to the beneficiaries of that area and then to propose the measures which willsecure more purposely the exploatation of the living resources by protecting and resuming the resources according to the needs.


  1. Name of project: Ribolovne poŠte za ludar, zagonicu i fruĐatu
    Name of institution: Op'ina Rab
    City: Rab, Hrvatska

  2. Name of project: Racionalno ribarstveno gospodarenje juĐnim dijelom Velebitskog kanala
    Name of institution: Ministarstvo pomorstva, prometa i veza
    City: 10000 - Zagreb, Croatia


  1. Name of institution: m
    Type of institution: State administration
    Type of cooperation: Occasional exchange of information
    City: Rab, Hrvatska


  1. Name: Datoteka bioloških podataka o demersalnim vrstama Jadrana
    Type of achievement: Catalogues, address books,
    Authors: J.Obradović,A.Slavica,G.Bačić

  2. Name: Model konzervacije živog resursa Jadrana
    Type of achievement: Prototypes
    Authors: J.Obradović,G.Bačić,A.Slavica

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Last update: 10/02/95